The Gunreaper is an enemy encountered in the Hollow and the Forge. It floats towards the player slowly and will proceed to send a homing wave of bullets with its rifle-like scythe. It cannot be killed, but once all other enemies in a room are dealt with, it will vanish.
While the Gunreaper cannot be killed conventionally, it can be transmogrified by certain guns and items such as Hexagun and Big Boy, and can be killed with Partially-Eaten Cheese. It can also be frozen, stunned, and charmed. Because the Gunreaper is invincible, it can block the player's projectiles without consequence, potentially allowing other enemies to take cover behind it.