Most of the time, higher tier monsters have all the abilities of preceding tiers, with increased intensity.
The Swarm Traits by Tier
All Tiers
The Swarm is a dark entity that is often perceived as strange, black pixels floating around endlessly.
The swarm is located inside the Core and is "leeching" off of the energy within it. Its power becomes more intense and tangible as Knights descend into its territory, and reaches a high concentration within the Unknown Passage.
Strategy
Guide: The Swarm Combat
Pending
Quick Glance Gear:
Pending
Swarm Portal
A vicious swarm portal...
A small swarm portal that is used to resurrect fallen members of the swarm. It is more like a Grim Totem than an actual monster, and therefore it does not fall under a bracket. Any swarm-infected monster placed above these dark portals will have their defences increased until they are invulnerable.
Since the Swarm Source buffs any monster, the Mecha Knight Kit can get buffed by it too. This is a bug.
The last level of 7-3 Mission: Spark and Roar spawns a black pixelated mist floating around the area. This along the green Crimson Order insignia on the floor points that the Swarm and Herex may be related.
The idea that the Swarm and Herex may be related is shown in the dialogue of Herex in the 10-2 Mission: Dreams and Nightmares and when there is a eye and what seems to be black clouds appear before the mission starts.
An expanding shadowy field that slows players down and buffs monsters.
Notes
After taking enough damage, it will decrease in size and be blocked for a short period of time.
Combat
Swarm Infection (To Monsters)
Swarm Infection (To Knights)
Loot is dropped when the monster is defeated. The loot that drops is random. Sometimes loot isn't dropped at all. This list is simply a pool of possible loot.
Loot
This monster does not drop loot.
Random spawns also apply to missions with floors that have geography similar to the relevant arcade area. The normal version of a monster can sometimes spawn instead of the status version in areas themed with a status, unless the spawn is guaranteed. See Gate Maps for details.
A shadowy cloud that fires bullets. Cannot be damaged or destroyed.
Notes
It offers absolutely no Crowns, Heat, Materials, or Vials, and (as part of The Swarm) they are invulnerable. Their defenses are enhanced on a Swarm Source.
Combat
Swarm Missile
Loot is dropped when the monster is defeated. The loot that drops is random. Sometimes loot isn't dropped at all. This list is simply a pool of possible loot.
Loot
This monster does not drop loot.
Random spawns also apply to missions with floors that have geography similar to the relevant arcade area. The normal version of a monster can sometimes spawn instead of the status version in areas themed with a status, unless the spawn is guaranteed. See Gate Maps for details.