+Glen, +Elendra (4)
Flying
, Sacrifice Glen Elendra Archmage: Counter target noncreature spell.
Persist (When this creature dies, if it had no -1/-1 counters on it, return it to the battlefield under its owner's control with a -1/-1 counter on it.)
Other blue creatures you control get +1/+1.
Other black creatures you control get +1/+1.
Whenever you cast a spell during an opponent's turn, you may return target creature you control to its owner's hand.
Flash
Gatherer works better in the Companion app!
, Sacrifice Glen Elendra Archmage: Counter target noncreature spell.