Ink-Eyes, Servant of Oni Avatar

At the beginning of the game, look at target opponent’s hand and choose a nonland card from it. That player discards that card.
, Pay X life: Put target creature card with converted mana cost X from an opponent’s graveyard onto the battlefield under your control.

Karona, False God Avatar

At the beginning of your upkeep, exchange control of a permanent you control chosen at random and a permanent target opponent controls chosen at random.

Rith, the Awakener Avatar

Whenever a creature you control deals combat damage to a player, you may pay . If you do, create a 5/5 red Dragon creature token with flying.

Frenetic Efreet Avatar

Each permanent you control has phasing. (It phases in or out before you untap during each of your untap steps. While it’s phased out, it’s treated as though it doesn’t exist.)
At the beginning of your end step, flip a coin. If you win the flip, take an extra turn after this one.

Platinum Angel Avatar

If you control an artifact, a creature, an enchantment, and a land, you can’t lose the game and your opponents can’t win the game.

Haakon, Stromgald Scourge Avatar

Pay 1 life: You may cast target creature card in your graveyard this turn.
Whenever you cast a creature spell from your graveyard, it becomes a black Zombie Knight.
If a Zombie Knight would be put into your graveyard from the battlefield, exile it instead.

Viridian Zealot Avatar

, Sacrifice a creature: Destroy target artifact or enchantment. Search your library for a card with the same name as the sacrificed creature, reveal that card, and put it into your hand. Then shuffle your library.

Peacekeeper Avatar

: For each opponent who controls a creature, create a token that’s a copy of a card named Arrest and attach it to a creature that player controls chosen at random.

Nekrataal Avatar

Creature spells you cast cost less to cast. This effect reduces only the amount of colored mana you pay.