Legions

As long as you control a Bird, Cloudreach Cavalry gets +2/+2 and has flying.

Flying Morph {2}{W} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.) When Wingbeat Warrio...

{2}{B}, {T}, Sacrifice a Zombie: Destroy target non-Zombie creature. It can't be regenerated. Activate this ability only any time you could cast a ...

{2}{B}, {T}, Sacrifice a Goblin: Destroy target land.

Double strike (This creature deals both first-strike and regular combat damage.) Morph {4}{R}{R} (You may cast this card face down as a 2/2 creatur...

Defender (This creature can't attack.) {3}: Turn Wall of Deceit face down. Morph {U} (You may cast this card face down as a 2/2 creature for {3}. T...

{7}{W}: You gain 5 life.

Morph {1}{U} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.) When Willbender is turned f...

Whenever a Beast enters the battlefield, you may gain 3 life.

Morph {1}{G} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.) When Tribal Forcemage is tu...

First strike (This creature deals combat damage before creatures without first strike.) Protection from black (This creature can't be blocked, targ...

Provoke (Whenever this creature attacks, you may have target creature defending player controls untap and block it if able.)

When Merchant of Secrets enters the battlefield, draw a card.

Trample Provoke (Whenever this creature attacks, you may have target creature defending player controls untap and block it if able.)

{7}{G}: Stonewood Invoker gets +5/+5 until end of turn.

Flying Cycling {2} ({2}, Discard this card: Draw a card.)

Cycling {2}{G}{G} ({2}{G}{G}, Discard this card: Draw a card.) When you cycle Gempalm Strider, Elf creatures get +2/+2 until end of turn.

{1}{U}: Change Riptide Mangler's base power to target creature's power. (This effect lasts indefinitely.)

Trample Morph {G} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.)

Covert Operative can't be blocked.

Whenever a player cycles a card, Warped Researcher gains flying and shroud until end of turn. (It can't be the target of spells or abilities.)

Amplify 1 (As this creature enters the battlefield, put a +1/+1 counter on it for each Zombie card you reveal in your hand.) At the beginning of yo...

Morph {3}{B}{B} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.) When Skinthinner is turn...

Vigilance Morph {1}{W} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.) When Liege of the...