Boss

• Burrowed Spikes
• Bite
• Thrown Spikes

• Gloaming Wildwoods: Lair of the Snarbolax.
• 3-2 Mission: Shadow of the Beast: Lair of the Snarbolax.

•  Frumious Fang(1-4)

Said to be a massive beast draped in living shadows, the Snarbolax enjoys toying with its prey before delivering the final blow. It is advised that only knights who have mastered Tier 1 take on this formidable beast as those who have entered unprepared have never returned!

• (Date of release: 06/02/2011)

• Tackle
• Spin (Phase 2)
• Repel
• Absorb Royal Mini

• Royal Jelly Palace: Battle Royale.
• 5-2 Mission: The Sovereign Slime: Battle Royale.

•  Jelly Gem(1-4)

The Royal Jelly is everything an unruly king is. He summons many of his Royal Minis to attack knights, while squishing many of these same Minis. He can also heal once he takes damage.

• (Date of release: Launch day)

• Energy Bullets
• Small Rockets
• Large Rockets (Phase 2)
• Laser (Phase 3)

• Ironclaw Munitions Factory: The Roarmulus Twins
• 6-2 Mission: Built to Destroy!: The Roarmulus Twins

•  Bark Module(1-4)

The Roarmulus Twins are a pair of very large Gun Puppies that make for the whole of their secret weapon the Gremlins call "Project Roarmulus". This secret weapon of theirs have one sole purpose set after their creation, the destruction of Haven! The proper test run for their weapon is the downfall of the Knights who intrude in their Ironclaw Munitions Factory, so beware of their dangerous weaponry they've built in them. Their creator is Warmaster Seerus himself, a member of the Crimson Order.

• (Date of release: 07/06/2011)

• Mace
• Charge
• Shadow Fire (Spawned by falling debris in Phases 3 & 5)
• Bullets (Phase 2, 4)
• Flame Souls (Phase 3, 5; passive)
• Fire Snake (Phase 5)

• Firestorm Citadel: Throne Room.
• 9-3 Mission: The King of Ashes: Throne Room.

•  Almirian Seal(1-4)

Lord Vanaduke was the young and determined king of the Almirian Empire before he was driven to madness and transformed into a grotesque monster.

• (Date of release: Launch day)

• Burrowed Spikes
• Bite
• Thrown Spikes

• Shadow Lair: Gloaming Wildwoods: Lair of the Snarbolax.

•  Frumious Fang (2-8)

The Gloaming Wildwoods has been infected with a poisonous miasma that has transformed the Snarbolax into the Rabid Snarbolaxes.

• This boss was introduced to the game in release 2011-10-19.

• Tackle
• Spin (Phase 2)
• Repel
• Absorb Ice Mini

• Shadow Lair: Royal Jelly Palace: Battle Royale.

•  Jelly Gem (2-8)

The Royal Jelly Palace has frozen over and its king usurped by the true heir to the slimy throne, the frigid Ice Queen.

• This boss was introduced to the game in release 2011-10-19.

• Energy Bullets
• Small Rockets
• Small Red Rockets
• Large Red Rockets (Phase 2)
• Red Laser (Phase 3)

• Shadow Lair: Ironclaw Munitions Factory: The Roarmulus Twins.

•  Bark Module (2-8)

The Ironclaw Munitions Factory has begun creating fiery weapons and improved upon its ultimate weapon in the form of the Red Roarmulus Twins.

• This boss was introduced to the game in release 2011-10-19.

• Mace
• Charge
• Shadow Fire (Spawned by falling debris)
• Bullets (Phase 2, 4)
• Flame Souls (Phase 3, 5; passive)
• Fire Snake (Phase 5)

• Shadow Lair: Firestorm Citadel: Throne Room.

•  Almirian Seal (2-8)

A powerful curse has overtaken the Firestorm Citadel, transforming its hordes and led by the mighty Darkfire Vanaduke.

• This boss was introduced to the game in release 2011-10-19.

• Hammer Smash
• Hammer Blast
• Spin Attack
• Bombs
• Rocket Dash

• Expansion Mission: Operation Crimson Hammer: Engines of War.

• Tier 1:

Fractured Seerus Mask Fragment (Obtained at the next depth, after using the elevator to continue.)

• Tier 2:

Flawed Seerus Mask Fragment (Obtained at the next depth, after using the elevator to continue.)

• Tier 3:

Perfect Seerus Mask Fragment (Obtained at the next depth, after using elevator to continue)

Warmaster Seerus is a member of the Crimson Order who owns the Grand Arsenal. He is the mastermind behind the Roarmulus Twins and countless other gremlin war machines. He wields the Warmaster Rocket Hammer, a powerful elemental weapon.

• (Date of release: 02/29/2012) - (Operation Crimson Hammer)

• Beam
• Tendril Wires
• Shield (Passive)

• Dangerous Mission: Ghosts in the Machine: Iron Hulk.

• None

The mini boss of Ghosts in the machine. It is a large, centuries old Battlepod-like enemy that is fixed to the chamber's floor. When it's active, it will go through three phases if enough damage is dealt per phase. Tendril-like "wires" constantly erupt out of the ground, target the player, and stab downward, burrowing back into the ground. These wires have health, but they appear and disappear so quickly that fighting with the intent of damaging them is moot. Shock spheres orbit The Big Iron for most of the fight. The Big Iron fires a number of laser beams in random directions. The Big Iron can only be damaged when it's mouth is open. It's mouth will open after it fires lasers a few times. The number of times differs per phase:

• First phase: Electronics glow yellow. summons a monster spawner in the upper left, which can spawn one Surgebot, Volt Knight or Voltrode at a time. Up to ?? wires may appear.
  • The Big Iron fires 2 lasers at once, 3 times, before its shield deactivates.

• Second phase: Electronics glow orange. Adds another monster spawner with the same behaviour as the first to the upper right area of the fight. Up to 4 wires may appear.
  • The Big Iron fires 4-6 lasers at once, 4 times, before its shield deactivates.

• Third phase: Electronics glow red.
  • The Big Iron fires 6-8 lasers at once, 5 times, before its shield deactivates.

After dealing enough damage to the Big Iron in the last phase, it shuts down and gets destroyed, but for good this time.

• (Date of release: 09/12/2012)

• Attack Buff
• Mace
• Ice Block Trail

• Dangerous Mission: Heart of Ice: Amu-Sol.

• Brimstone
• Swordstone
• Phial of Phear
• Trojan Horseshoe
• Red Shard
• Dark Shard
• Sinful Brew
• Vile Seal

The mini boss of Heart of Ice. A mysterious Frozen Trojan intending to freeze Cradle with Everfrost's power resource. The boss consists of three phases, during every phase Tundralisks will spawn. He uses a mace like Lord Vanaduke that will create a trail of breakable ice, causing the Freeze status to anyone who gets in the path of it. His attack buff also knocks back knights and creates blocks of ice. He is supported by a lot of cold monsters.

Maulos consists of 3 phases:

• In the first phase he spawns two invincible Perma-Frostifur. When he's dealt enough damage, Maulos will surround himself with a block of ice, will not move and will be very easy to hit.
• In the second phase he spawns around four Frostifurs and when hit enough will again surround himself with ice. Frozen Souls come to help Maulos in this part of the battle.
• In the third phase he spawns two to four Layoafers. He is finally defeated and shattered to pieces when he takes enough damage.
• (Date of release: 08/01/2012)

• Sword Combo
• Sword Slam
• Revive + Energy Blast
• Shadow Orbs
• Shadow Spikes

• 9-1 Mission: The Silent Legion: Cryptic Statuary.

• None

Arkus, a fallen ex-knight of the Spiral Order. Despite the fact that he seems to have transformed into a Trojan, he retains the attack style of a spiral knight. A few aspects differ him from a regular T3 Trojan:

• Long weapon reach - this Trojan's attacks seem to be able to reach twice as far as any other regular Trojan's.
• No immunity to frontal damage - you can hit him from any side, but the frontal damage is substantially reduced.
• Wider array of possible attacks - a normal Trojan has only three attacks available. This one has five.
• No abrupt dashing - Arkus is not capable of dashing, unlike other Trojans. He is also incapable of buffing his attack power.
• When he is defeated, he "revives" like a regular Spiral Knight; however he can only do this twice, resulting in the fight taking place in 3 phases. Each time he revives, the crystal on his black glows more fiercely, two more Shadow Orbs encircle him and fiend family monsters appear to aid him (some Beryl Greavers and a Silkwing).
• (Date of release: 03/07/2012)

• Charge
• Goo Grenades
• Explosion
• Shock Oil (Mission 10-1 only)

• 2-3 Mission: The Collector: Camp Crimson.
• 10-1 Mission: Breaking in the Recruits: The Overworks.

• None

The Collector, a large construct created by Gremlins. It collects and imprisons Battle Sprites that have fallen into the Clockworks. It is encountered once again in Mission 10-1, only upgraded to be a more fearsome machine than before.

• (Date of release: 07/30/2013)

• Smash

• Crash Site: Waking in a New World.

• None

A large, Lumber-like entity with fire in its head that uses an axe-like weapon to attack. It behaves like the smaller Lumber monster. The Ironwood Sentinel appears in the Crash Site as the first Mini Boss new players face. It moves slowly and has bulky health. Some Gun Puppies appear in the battle to support it.

• (Date of release: 12/11/2013)

• Flamethrower
• Balefire

• 1-4 Mission: Crossing the Chasm: The Journey to Haven.

• None

The Gremlin Schemer Razwog was thought to be the one who sent a battalion of Retrodes at the Rescue Camp and is the first Gremlin the player must fight. He looks and behaves very similarly to a Scorcher.

• (Date of release: 05/09/2012)

???

• 4-3 Mission: Shocking Sentient Sentries: Heavy Weapons Facility.
• 8-2 Mission: The Great Escape: The Yard.

???

A mad Grinchlin Knocker that creates machines under the employment of Warmaster Seerus. Though he's not fought directly by himself, he lets his inventions do the fighting for him.

• (Date of release: 05/21/2014)

• Blade Slash
• Blade Throw
• Recon Cloak
• Death Mark

• Shadowplay: Throne Room

Herex, the Whispering Venom, was a member of the Crimson Order. Herex consists of 3 phases:

• In the first phase he summons various Poison Knights, Sick Puppies and Blech Bunnies. After defeating all monsters, Herex will appear cloaked ready to attack a random player of the party.
• In the second phase he summons various Poison Knights, Sick Puppies, Blech Bunnies and Isotrodes. After defeating all monsters, Herex will appear cloaked ready to attack a random player of the party again.
• In the third phase he summons Poison Knights, Darkfang Thwackers, Darkfang Menders, Darkfang Demos and Toxic Mortafires. He is finally defeated when he takes enough damage after back to attack a random player.
• (Date of release: 04/13/2015)

???

• Treasure Vaults.

???

The Treasure Mimic, a monster disguised as a big treasure box of some sort located beneath the Treasure Vaults themselves.

• (Date of release: 06/27/2019)

Being a Batterbot:

• Swipe
• Beam

Being a Creep Cake:

• Tackle
• Candles Attack

• Event Mission: A Gremlin in Knead: Moonstone Mixup (available during Caketastrophe).

• No Special Drops, but a number of Cake Slices are mission rewards (they used to drop in the level but were changed to be rewarded upon reaching Haven due to exploitation).

A red Creep Cake who acts as the final enemy of the "A Gremlin in Knead" mission. Dread Velvet was revealed to be hiding under Groat's chef hat as the battle went on (the player initially fights Groat for the first few stages of this fight). Dread Velvet seems to be responsible for creating Current Cakes, and was possessing Groat by perching on Groat's head. Dread Velvet appears in the later stages of the final battle as a Batterbot form. After this form is destroyed this mini-boss will act like a normal Creep Cake and can rarely inflict curse.

• (Date of release: 04/02/2014)

• Rockets
• Orbital Chain
• Repel + Ally Attack Buff
• Shield (Passive)
• Blockades (Passive)

• Event Dangerous Mission: Grinchlin Assault!: Summit.

• None

The miniboss of Summit. Though sometimes labelled "Krampod"(likely a portmanteau of a reference to the Krampus by blending Krampus' name and this Battlepod's name together) by some people, this large Battlepod blocks the path to the loot boxes at the top of Mount Krampus.

Many monster spawners appear during the battle to aid the Battlepod. They vary between Slush Puppies, Rocket Puppies, Grinchlin Thwackers, Grinchlin Stalkers, Darkfang Menders and Humbugs.

The entire battle consists of only one phase with a reasonable amount of health for a miniboss.

Like a normal Battlepod, it is equipped with many weapons made by Grinchlins to exterminate any that trespass Mount Krampus. This Battlepod has a protective force field that can be destroyed by damaging it enough, leaving it defenseless towards attacks. Its mouth will close once the field's fragment is down. However, this Battlepod will regenerate the force field in a short time, so it's essential to attack quick before it regenerates. Damaging it enough will destroy the Battlepod.

• (Date of release: 12/11/2013)

• Bite
• Orbiting Bullets
• Cursed Summon
• Poison Smog
• Summon Black Kats

• Moorcroft Manor (available as long as a player has a Book of Dark Rituals material.

• Ancient Page Tokens (x6)
• Black Kat Cowl (User of Book of Dark Rituals only.)

A massive Grimalkin-like creature, summoned accidentally by the Konjuring Kat's dark ritual using the Book of Dark Rituals. Margrel was originally the great Kat Tribe hero who opened the Book of Grey Feathers, causing about the Kataclysm destroying both the Kat-tribe and the Owlites.

Margrel is the unluckiest Kat to have ever lived.

• (Date of release: 01/30/2013)