Flying

When Abhorrent Overlord enters the battlefield, create a number of 1/1 black Harpy creature tokens with flying equal to your devotion to black. (Each {B} in the mana costs of permanents you control counts toward your devotion to black.)

At the beginning of your upkeep, sacrifice a creature.

Destroy target creature. It can't be regenerated. Its controller creates a 1/1 white Spirit creature token with flying.

Whenever a creature or planeswalker you control dies, you may sacrifice Ajani's Last Stand. If you do, create a 4/4 white Avatar creature token with flying.

When a spell or ability an opponent controls causes you to discard this card, if you control a Plains, create a 4/4 white Avatar creature token with flying.

Whenever Blood Artist or another creature dies, target player loses 1 life and you gain 1 life.

Create three 1/1 white Vampire creature tokens with lifelink.

At the beginning of each player's upkeep, that player sacrifices a non-Zombie creature.

At the beginning of the end step, if no creatures are on the battlefield, sacrifice Call to the Grave.

If one or more creature tokens would be created under your control, that many 4/4 white Angel creature tokens with flying and vigilance are created instead.

+2: Create a 1/1 white Kor Soldier creature token. You may attach an Equipment you control to it.

-2: You may put an Equipment card from your hand or graveyard onto the battlefield.

-10: Create a colorless Equipment artifact token named Stoneforged Blade. It has indestructible, "Equipped creature gets +5/+5 and has double strike," and equip {0}.

Nahiri, the Lithomancer can be your commander.

Whenever a nontoken creature you control dies, create a 2/2 black Zombie creature token.

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Flying

At the beginning of each end step, if you gained life this turn, create a 1/1 black Bat creature token with flying.

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Vigilance, protection from creatures

Whenever a creature deals combat damage to you, destroy that creature. Create a 1/1 white and black Spirit creature token with flying.

Sacrifice three white creatures: Exile target creature.

Whenever another black creature you control dies, create a 1/1 white Spirit creature token with flying.

{2}, {T}: Each opponent loses 1 life and you gain 1 life.

Whenever Xathrid Necromancer or another Human creature you control dies, create a tapped 2/2 black Zombie creature token.

Whenever Zulaport Cutthroat or another creature you control dies, each opponent loses 1 life and you gain 1 life.