Tidal Claimant

Tribute 2 (As this creature enters the battlefield, an opponent of your choice may place two +1/+1 counters on it.)
When Tidal Claimant enters the battlefield, if tribute wasn't paid, target player reveals his or her hand. You choose the name of a nonland, noncreature card revealed this way. That player can't cast spells with the chosen name.
"The Tidals obey Kialla. For now."