
Leyline Phantom | Creature | Illusion | When Leyline Phantom deals combat damage, return it to its owner's hand. (Return it only if it survived combat.) | Ryan Yee

Mindeye Drake | Creature | Drake | Flying
When Mindeye Drake dies, target player mills five cards. | Lars Grant-West

Horror of the Dim | Creature | Horror | {U}: Horror of the Dim gains hexproof until end of turn. (It can't be the target of spells or abilities your opponents control.) | Jack Wang

Consuming Aberration | Creature | Horror | Consuming Aberration's power and toughness are each equal to the number of cards in your opponents' graveyards.
Whenever you cast a spell, each opponent reveals cards from the top of their library until they reveal a land card, then puts those cards into their graveyard. | Karl Kopinski