Theros Beyond Death

Hero of the Nyxborn | Enchantment Creature | Human Soldier | When Hero of the Nyxborn enters the battlefield, create a 1/1 white Human Soldier creature token. Whenever you cast a spell that targets Hero of the Nyxborn, creatures you control get +1/+0 until end of turn. | Victor Adame Minguez

Siona, Captain of the Pyleas | Legendary Creature | Human Soldier | When Siona, Captain of the Pyleas enters the battlefield, look at the top seven cards of your library. You may reveal an Aura card from among them and put it into your hand. Put the rest on the bottom of your library in a random order. Whenever an Aura you control becomes attached to a creature you control, create a 1/1 white Human Soldier creature token. | Chris Rallis

Devourer of Memory | Creature | Nightmare | Whenever one or more cards are put into your graveyard from your library, Devourer of Memory gets +1/+1 until end of turn and can't be blocked this turn. {1}{U}{B}: Mill a card. | Daarken

Mischievous Chimera | Enchantment Creature | Chimera | Flying Whenever you cast your first spell during each opponent's turn, Mischievous Chimera deals 1 damage to each opponent. Scry 1. | Antonio José Manzanedo

Eutropia the Twice-Favored | Legendary Creature | Human Wizard | Constellation — Whenever an enchantment enters the battlefield under your control, put a +1/+1 counter on target creature. That creature gains flying until end of turn. | Sara Winters

Slaughter-Priest of Mogis | Creature | Minotaur Shaman | Whenever you sacrifice a permanent, Slaughter-Priest of Mogis gets +2/+0 until end of turn. {2}, Sacrifice another creature or an enchantment: Slaughter-Priest of Mogis gains first strike until end of turn. | Steve Prescott

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

Warden of the Chained | Creature | Minotaur Warrior | Trample Warden of the Chained can't attack unless you control another creature with power 4 or greater. | Steve Prescott