Kayle, the Righteous

At the beginning of your upkeep, put a justice counter on Kayle.

Ascension—As long as Kayle has three or more justice counters, she gets +2/+2 and has double strike.

Redemption—Remove three justice counters from Kayle: Prevent all damage that would be dealt to another target creature you control this turn. You gain life equal to the damage prevented this way.