Helm of Cela

Equipped Creature has Deathtouch.
{2}{u}{b}, sacrifice equipped creature: Attach Helm
of Cela to target creature you control. Helm of
Cela gains "Equipped creature gets +X/+X",
where X is twice the sacrificed creature's Mana
Value.
Equip: {1}
Helm of Cela can be your commander