Heli, Wayward Priestess

+1: Put two +1/+1 counters on up to one target creature, then gain life equal to half its toughness, rounded down.
-2: Until your next turn, prevent all damage that would be dealt by target creature.
-7: You get an emblem with "If a source would deal damage to you or a permanent you control, prevent two thirds of that damage, rounded up."