Double Tap Root Beer

Every creature you control gains double strike
Perk loss — At the end of each combat step, if you
lost life from combat damage, choose one card
with the Perk subtype on your battlefield
then sacrifice one of them.
Rebuy — During yout turn, you may cast this
card from your graveyard by paying {x} + its
converted mana cost, where X is equal to the
number of time you activated this ability on
this card.