Soul Burn

{X}{2}{B} · Sorcery

Spend only black and/or red mana on X. Soul Burn deals X damage to any target. You gain life equal to the damage dealt, but not more than the amount of {B} spent on X, the player's life total before the damage was dealt, the planeswalker's loyalty before the damage was dealt, or the creature's toughness.

Motor: se resuelve a mano

Rulings (1)

Will give 1 life for each black mana used, but not more life than the amount of unprevented damage that is dealt.
Wizards of the Coast · 2004-10-04