Kharne, the Betrayer

Haste, Menace, Double Strike, Hexproof from instants
Whenever Kharne, the Betrayer attacks or enters
the battlefield, you lose 2 life.
{b/r}{b/r}{b/r}{b/r}, sacrifice a creature : You gain 3 life. If
the creatures power was 5 or greater, you instead
gain 6 life and create a treasure token with "{t}, Sacrifice this artifact : You add one mana of
any color."
"Attack" is the only command worth remembering
- Kharne