Titan of Primal Forests

Trample, Hexproof, Indestructible, Reach
Whenever a nontoken creature enters the battlefield under your control, you may pay {x} and tap Titan of Primal Forests. If you do, put the top {x} cards of your library into your graveyard, put a creature card from your graveyard into your hand, gain {x} life, and put {x} +1/+1 counters on another target creature you control.