Have

Selhoff Occultist

Whenever Selhoff Occultist or another creature dies, target player mills a card.

Stasis Field

Enchant creature
Enchanted creature has base power and toughness 0/2, has defender, and loses all other abilities.

Thought Collapse

Counter target spell. Its controller mills three cards.

Aqueous Form

Enchant creature
Enchanted creature can't be blocked.
Whenever enchanted creature attacks, scry 1. (Look at the top card of your library. You may put that card on the bottom.)

Tome Scour

Island

Benthic Giant

Hexproof (This creature can't be the target of spells or abilities your opponents control.)

Jace's Erasure

Whenever you draw a card, you may have target player mill a card.

Mana Leak

Counter target spell unless its controller pays {3}.

Mind Sculpt

Foresee

Merfolk Looter

Jeskai Sage

Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)
When Jeskai Sage dies, draw a card.

Countermand

Counter target spell. Its controller mills four cards.

Containment Membrane

Surge {U} (You may cast this spell for its surge cost if you or a teammate has cast another spell this turn.)
Enchant creature
Enchanted creature doesn't untap during its controller's untap step.

Shriekgeist

Flying
Whenever Shriekgeist deals combat damage to a player, that player mills two cards.