Freeflame Invoker

Whenever Freeflame Invoker attacks, you may sacrifice another creature. If you do, Freeflame Invoker deals X damage to any target, where X is
the mana value of the sacrificed creature. If its
total power and toughness was greater than 7,
draw a card.
—
"The guardians of Sefterati have long shown their displeasure towards the undead that roam their lands.
I am merely borrowing their strength to carry out their
will."