Ervyxx, Infinite Origin

: When Ervyxx enters the battlefield, put 3 loyalty counters on Slivers you control, they are planeswalkers and have Ervyxx's loyalty abilities.
+1: Sliver creatures you control get +1/+1 and gain vigilance, flying, lifelink, first strike, and trample until the beginning of your next upkeep.
-X: This Planeswalker deals X damage to target creature, you gain X life.