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

: Add  to your mana pool.

: Add  or to your mana pool. Each opponent gains 1 life.

: Obsidian Clachan becomes a 0/4 white and black Horror creature with defender until end of turn. It's still a land.