Theros Beyond Death

Haktos the Unscarred | Legendary Creature | Human Warrior | Haktos the Unscarred attacks each combat if able. As Haktos enters the battlefield, choose 2, 3, or 4 at random. Haktos has protection from each mana value other than the chosen number. | Ryan Pancoast

Calix, Destiny's Hand | Legendary Planeswalker | Calix | +1: Look at the top four cards of your library. You may reveal an enchantment card from among them and put that card into your hand. Put the rest on the bottom of your library in a random order. −3: Exile target creature or enchantment you don't control until target enchantment you control leaves the battlefield. −7: Return all enchantment cards from your graveyard to the battlefield. | Magali Villeneuve

Atris, Oracle of Half-Truths | Legendary Creature | Human Advisor | Menace When Atris, Oracle of Half-Truths enters the battlefield, target opponent looks at the top three cards of your library and separates them into a face-down pile and a face-up pile. Put one pile into your hand and the other into your graveyard. | Bastien L. Deharme

Enigmatic Incarnation | Enchantment | | At the beginning of your end step, you may sacrifice another enchantment. If you do, search your library for a creature card with mana value equal to 1 plus the sacrificed enchantment's mana value, put that card onto the battlefield, then shuffle. | PINDURSKI

Acolyte of Affliction | Creature | Human Cleric | When Acolyte of Affliction enters the battlefield, mill two cards, then you may return a permanent card from your graveyard to your hand. | Chase Stone

Polukranos, Unchained | Legendary Creature | Zombie Hydra | Polukranos enters the battlefield with six +1/+1 counters on it. It escapes with twelve +1/+1 counters on it instead. If damage would be dealt to Polukranos while it has a +1/+1 counter on it, prevent that damage and remove that many +1/+1 counters from it. {1}{B}{G}: Polukranos fights another target creature. Escape—{4}{B}{G}, Exile six other cards from your graveyard. | Chris Rahn