Enturbiar, Tidesweeping Titan

Enturbiar, Tidesweeping Titan gets +X/+X where X is the number of Tidal counters you have.
When Enturbiar, Tidesweeping Titan enters the battlefield, you may exile it. If you do, choose 1--
-Tap target creature an opponent controls.
-Untap target creature you control.
-Draw a card, then discard a card.
Whenever Enturbiar, Tidesweeping Titan is sent from the battlefield to the command zone, you get a tide counter.