Gylorn, Sage of Yawgmoth

Deathtouch, lifelink
When Gylorn, Essence of Yawgmoth enters the battlefield, triple the amount of damage done to each player and each creature this turn.
{4}{p/b}, {t}: Put target creature card from any graveyard onto the battlefield under your control, deal X damage to yourself, where X is the creature card's converted mana cost.
Sacrifice Gylorn, Essence of Yawgmoth: Gain life equal to the number of creature cards in each graveyard.