Thogar, Khar'th Cheiftain

Trample
Whenever a creature an opponent controls dies
for the first time each turn, they take 3 damage,
you gain that much life. Reveal the top X cards
of their library where X is the amount of damage
they received, then they choose one card among
them and exile the rest. Shuffle their library.
{b}{r}, sacrifice a creature: Thogar gains
deathtouch until end of turn.