Indestructible
As long as your devotion to white and black is less than seven, Athreos isn't a creature.
At the beginning of your end step, put a coin counter on another target creature.
Whenever a creature with a coin counter on it dies or is put into exile, return that card to the battlefield under your control.

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.

Whenever you gain life for the first time each turn, create a 1/1 white Cat creature token.
: Another target Cleric gains lifelink until end of turn.

Mutate (If you cast this spell for its mutate cost, put it over or under target non-Human creature you own. They mutate into the creature on top plus all abilities from under it.)
Whenever this creature mutates, exile cards from the top of your library until you exile X permanent cards, where X is the number of times this creature has mutated. Put those permanent cards onto the battlefield.

Flying
When Aven Gagglemaster enters the battlefield, you gain 2 life for each creature you control with flying.

Flying
Cycling (, Discard this card: Draw a card.)
When you cycle Avian Oddity, put a flying counter on target creature you control.

Whenever Ayara, First of Locthwain or another black creature enters the battlefield under your control, each opponent loses 1 life and you gain 1 life.
, Sacrifice another black creature: Draw a card.

You may play two additional lands on each of your turns.

Return target creature card from your graveyard to the battlefield. When you do, it fights up to one target creature you don't control. (Each deals damage equal to its power to the other.)

You draw two cards and each opponent discards two cards. Each player loses 2 life.

Destroy target creature. Create a Food token. (It's an artifact with ", , Sacrifice this artifact: You gain 3 life.")

Return target card from your graveyard to your hand.

Bala Ged Sanctuary enters the battlefield tapped.
: Add .

Flying, first strike, lifelink, protection from Demons and from Dragons

When you cast this spell from your hand, copy it if you control an artifact, then copy it if you control an enchantment. You may choose new targets for the copies.
Return target nonland permanent to its owner's hand. You create a 2/2 white Knight creature token with vigilance.

When Banishing Light enters the battlefield, exile target nonland permanent an opponent controls until Banishing Light leaves the battlefield.

Target attacking creature gets +2/+2 until end of turn. Each attacking non-Human creature gains trample until end of turn.

Exile up to three target enchantments.
Cycling (, Discard this card: Draw a card.)

When Barrin, Tolarian Archmage enters the battlefield, return up to one other target creature or planeswalker to its owner's hand.
At the beginning of your end step, if a permanent was put into your hand from the battlefield this turn, draw a card.

When Barrow Witches enters the battlefield, return target Knight card from your graveyard to your hand.