Theros Beyond Death

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

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

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