(: Add or to your mana pool.)

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

, , Sacrifice Howltooth Karoo: Put a -1/-1 counter on target creature.

, : Target land becomes a 2/2 white Cleric Angel creature until end of turn. It's still a land.