At the beginning of your end step, if you didn't cast any spells this turn, Obsidian Bluffs deals 1 damage to you. : Add  to your mana pool. : Add  or to your mana pool. Each opponent gains 1 life. : Obsidian Bluffs becomes a 2/1 black and red Cleric Rogue creature until end of turn. It's still a land.