Hafina, Death Defiant

First Strike
Whenever a creature with vigilance you control
dies on combat, you may exile it. If you do, you
get a vigiliance counter.
Creatures you control have vigilance while you
have vigilance counters. The same is true for
first strike, double strike, deathtouch, hexproof,
indestructible, protection, lifelink, menace, reach,
trample, and flying.