Geicer

A Geicer is a monster added in Revelations Chapter One.

Geicer
Geicer is a stationary monster that can be found in the Glacier floorpath. He regularly shoots Stalactites at the player, which instantly break upon landing, shooting tears in a 4-direction cardinal pattern. He also does contact damage.

Coal Heater
Coal Heater is a variant of the Geicer added in the Neapolitan Update. They attack by first heating up, then launching a chunk of hot coal into the ceiling. This then causes a cluster of snow to fall on top of where the player was, dealing damage, making it a slightly slower and easier form of the Geicer's attack.

In chill rooms, Coal Heaters create large heat auras around themselves as they're charging their attack. In addition, they will also spawn a Grill O' Wisp upon death in chill rooms.