+drowner (4)
Whenever a player casts a blue spell, you may pay . If you do, target player mills two cards.
Devoid (This card has no color.)
When Drowner of Hope enters the battlefield, create two 1/1 colorless Eldrazi Scion creature tokens. They have "Sacrifice this creature: Add ."
Sacrifice an Eldrazi Scion: Tap target creature.
Tap an untapped Merfolk you control: Target player mills a card.
Exploit (When this creature enters the battlefield, you may sacrifice a creature.)
When Gurmag Drowner exploits a creature, look at the top four cards of your library. Put one of them into your hand and the rest into your graveyard.
Gatherer works better in the Companion app!
."