Silver-Arc Paladin

Lifelink, Double Strike, Vigilance
Whenever a nontoken creature you control dies, exile it instead and create a creature token that's a copy of that creature. Creatures you control have indestructible and hexproof if you are at 1 life. If you are at 20 life, creatures your opponents control have -3/-4, and can't untap.
Although their order is one of benevolence and heroism, they still will go through with any means necessary to defeat their foes.