Bog Brain

"The headaches worsened, gouging out old memories. but in their stead, were visions of greater importance."

Bog Brain is a common battle Bog-Parasite for Rook, it costs 1 action and has the effect: "When this card is drawn, gain 2 Impair and draw 2 cards. Expend, Parasite, Hatch"

Playing Bog Brain has no effect, except expending it and gaining experience with it.

Hatch
When Bog Brain Hatches, it's transformed into a random uncommon battle Bog Parasite, so Branch, Delirium or Fever.