Kayle, the Righteous Flame

Level up {w} ({w}Put a level counter on this.
Level up only as a sorcery.)
6-10 Flying, vigilance, double strike, lifelink (6/6)
11-15 Indestructible, hexproof, trample (11/11)
16+ Whenever Kayle, the Righteous Flame attacks, exile up to five nonland permanents
and put an indestructible counter on target nonland permanent you control (16/16)