Yosemite

{t}{r}{r}{w}{w}

When Yosemite becomes tapped sacrafice it unless
you discard 2 cards and lose 3 life
Yosemite doesn't untap during your untap step

whenever you cast a spell during an oppenents turn, you may untap Yosemite, if you do Yosemite deals 3 damage any target of an opponents choice excluding you and permanents you control.