Enigmatic Incarnation

At the beginning of your end step, you may sacrifice another enchantment. If you do, search your library for a creature card with converted mana cost equal to 1 plus the sacrificed enchantment’s converted mana cost, put that card onto the battlefield, then shuffle your library.

Threnody Singer

Flash
Flying
When Threnody Singer enters the battlefield, target creature an opponent controls gets -X/-0 until end of turn, where X is your devotion to blue. (Each in the mana costs of permanents you control counts toward your devotion to blue.)

Underworld Dreams

Whenever an opponent draws a card, Underworld Dreams deals 1 damage to that player.

Enigmatic Incarnation

At the beginning of your end step, you may sacrifice another enchantment. If you do, search your library for a creature card with converted mana cost equal to 1 plus the sacrificed enchantment’s converted mana cost, put that card onto the battlefield, then shuffle your library.

Arena Trickster

Whenever you cast your first spell during each opponent’s turn, put a +1/+1 counter on Arena Trickster.

Hard Cover

Enchant creature
Enchanted creature gets +0/+2 and has “: Draw a card, then discard a card.”

Elite Guardmage

Flying
When Elite Guardmage enters the battlefield, you gain 3 life and draw a card.