This Mysterious Room segment only appears during the Winterfest event.
It rewards a cache of 36 Grinchlin Treasure Boxes that contain crowns, heat, and Frozen Winterfest Wishlist tokens.
The player must choose between:
Exploration entities:
If Party Button is in the open:
[show]
Monsters:
Wave 1:
Wave 2:
Wave 3:
Exploration entities:
If Party Button is near 4 stand-alone Mush Blocks:
[show]
Monsters:
Wave 1:
Wave 2:
Wave 3:
Exploration entities:
or
Exploration entities:
If Party Button is near two rows of blast blocks:
[show]
Monsters:
Wave 1:
Wave 2:
Wave 3:
Exploration entities:
If Party Button is near two arcs of mush blocks:
[show]
Monsters:
Wave 1:
Wave 2:
Wave 3:
Exploration entities: