Theros

Flying When this creature enters, 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.

2U: This creature can't be blocked this turn.

Deathtouch Heroic — Whenever you cast a spell that targets this creature, each opponent sacrifices a creature of their choice.

Heroic — Whenever you cast a spell that targets this creature, create a 1/1 red Soldier creature token with haste. (It can attack and T as soon as it comes under your control.)

Whenever this creature attacks, it gets +X/+0 until end of turn, where X is the number of attacking creatures you control.

Defender When this creature enters, an opponent gains control of it. At the beginning of your upkeep, each opponent creates a 1/1 white Soldier creature token.

First strike, vigilance Heroic — Whenever you cast a spell that targets Anax and Cymede, creatures you control get +1/+1 and gain trample until end of turn.

Anger of the Gods deals 3 damage to each creature. If a creature dealt damage this way would die this turn, exile it instead.

Counter target artifact or enchantment spell.

Heroic — Whenever you cast a spell that targets Anthousa, up to three target lands you control each become 2/2 Warrior creatures until end of turn. They're still lands.

Flying First strike (This creature deals combat damage before creatures without first strike.)

Enchant creature Enchanted creature can't be blocked. Whenever enchanted creature attacks, scry 1. (Look at the top card of your library. You may put that card on the bottom.)

Reach 3GGG: Monstrosity 3. (If this creature isn't monstrous, put three +1/+1 counters on it and it becomes monstrous.) When this creature becomes monstrous, destroy target creature with flying an opponent controls.

Heroic — Whenever you cast a spell that targets this creature, target creature an opponent controls can't block this turn.

Heroic — Whenever you cast a spell that targets this creature, you may have this creature become a copy of target creature, except it has this ability.

Destroy target artifact or enchantment. Scry 2. (Look at the top two cards of your library, then put any number of them on the bottom and the rest on top in any order.)

Flying When this creature enters or dies, exile target permanent.

+2: Exile the top three cards of target opponent's library. −X: Put a creature card with mana value X exiled with Ashiok onto the battlefield under your control. That creature is a Nightmare in addition to its other types. −10: Exile all cards from all opponents' hands and graveyards.

2B: Regenerate this creature.

Bestow 4B (If you cast this card for its bestow cost, it's an Aura spell with enchant creature. It becomes a creature again if it's not attached.) Deathtouch (Any amount of damage this deals to a creature is enough to destroy it.) Enchanted creature gets +1/+1 and has deathtouch.

Heroic — Whenever you cast a spell that targets this creature, put a +1/+1 counter on this creature, then scry 1. (To scry 1, look at the top card of your library, then you may put that card on the bottom.)

Target creature gets +2/+2 until end of turn. Scry 1. (Look at the top card of your library. You may put that card on the bottom.)

Hexproof (This creature can't be the target of spells or abilities your opponents control.)

Whenever a creature you control deals combat damage to a player, you may draw a card. 1U, T: Creatures your opponents control attack this turn if able.