Gain control of target creature until end of turn. Untap that creature. It gains haste until end of turn. (It can attack and this turn.)

When Aether Adept enters the battlefield, return target creature to its owner's hand.

Whenever a creature enters the battlefield under your control, you gain 1 life.

[+2]: You gain 1 life for each creature you control.
[−3]: Creatures you control get +2/+2 until end of turn.
[−9]: Put X +1/+1 counters on target creature, where X is your life total.

Anax's power is equal to your devotion to red. (Each in the mana costs of permanents you control counts toward your devotion to red.)
Whenever Anax or another nontoken creature you control dies, create a 1/1 red Satyr creature token with "This creature can't block." If the creature had power 4 or greater, create two of those tokens instead.

Whenever Arashin War Beast deals combat damage to one or more blocking creatures, manifest the top card of your library. (Put it onto the battlefield face down as a 2/2 creature. Turn it face up any time for its mana cost if it's a creature card.)

First strike, haste
Whenever a player casts a spell from a graveyard, Ash Zealot deals 3 damage to that player.

At the beginning of your upkeep, put a muster counter on Assemble the Legion. Then create a 1/1 red and white Soldier creature token with haste for each muster counter on Assemble the Legion.

Protection from black and from red
Whenever another creature enters the battlefield, you may gain 1 life.

Whenever Avalanche Tusker attacks, target creature defending player controls blocks it this combat if able.

Flash
Flying
If an opponent would search a library, that player searches the top four cards of that library instead.

Flying
Whenever Balefire Dragon deals combat damage to a player, it deals that much damage to each creature that player controls.

Each player sacrifices two creatures.

: Gain control of target creature with power less than or equal to the number of creatures you control.

, : Tap target creature.

, : Search your library for a card named Festering Newt or Bubbling Cauldron, put it onto the battlefield tapped, then shuffle your library.

Flash
Flying
Brazen Borrower can block only creatures with flying.

, , Sacrifice a creature: You gain 4 life.
, , Sacrifice a creature named Festering Newt: Each opponent loses 4 life. You gain life equal to the life lost this way.

Other Vampire creatures you control get +1/+1.
Tap five untapped Vampires you control: Gain control of target creature. It becomes a Vampire in addition to its other types.

Each player chooses from among the permanents they control an artifact, a creature, an enchantment, and a land, then sacrifices the rest.