Galen Marek

Double strike
{w}{w}{t}: Sacrafice Galen Marek. Creatures you control, that would die this turn,
stay on the battlefield and get tapped.
{b}{b}{b}{t}: Sacrafice any creature with mentor,
that has lower toughness than the creature with
mentor with the highest toughness among all creatures on the battlefield. Then transform
Galen Marek.
"I am my Master's weapon. I lay waste to all that stands in his path."