Theros Beyond Death

Alseid of Life's Bounty | Enchantment Creature | Nymph | Lifelink {1}, Sacrifice Alseid of Life's Bounty: Target creature or enchantment you control gains protection from the color of your choice until end of turn. | Magali Villeneuve

Sage of Mysteries | Creature | Human Wizard | Constellation — Whenever an enchantment enters the battlefield under your control, target player mills two cards. | John Stanko

Hateful Eidolon | Enchantment Creature | Spirit | Lifelink Whenever an enchanted creature dies, draw a card for each Aura you controlled that was attached to it. | Daniel Ljunggren

Chainweb Aracnir | Creature | Spider | Reach When Chainweb Aracnir enters the battlefield, it deals damage equal to its power to target creature with flying an opponent controls. Escape—{3}{G}{G}, Exile four other cards from your graveyard. (You may cast this card from your graveyard for its escape cost.) Chainweb Aracnir escapes with three +1/+1 counters on it. | Sam Rowan