Arcane Crypt is a cleric Trap Room that will be introduced with Boss Monster 2.
Strategy[]
Arcane Crypt is a card meant to work with other cards that can destroy rooms cards, like Boulder Ramp, Crushinator, etc. This card, like other 'uncover' rooms, shine when another room is built over this card, and the room is destroyed, thus activating the effect of this room when needed, instead of just once upon being built.