At the beginning of your end step, if you didn't cast any spells this turn, Calciform Chamber deals 1 damage to you.

: Add  to your mana pool. Activate this ability only if you control a Plains.

: Add  to your mana pool. Activate this ability only if you control an Island.

: Calciform Chamber becomes a 2/1 white and blue Cleric Kor creature until end of turn. It's still a land.