Alex, Unhinged Treason

+2: Put a +1/+1 counter on each creature you control with power 3 or more till the end of the turn, as well as gain double strike
X: Send a creature you control to the graveyard, then gain X devotion where X is equal to its power
-X: This card is able to attack till the end of the turn with double strike, where power and toughness are its current devotion, then return to 1 dev