Legions

This creature gets +2/+2 for each face-down creature on the battlefield. Morph {3}{G} (You may cast this card face down as a 2/2 creature for {3}. ...

All Sliver creatures get +0/+1.

{3}{W}, Exile this creature: Exile all creatures. At the beginning of the next end step, return those cards to the battlefield under their owners' ...

When Phage enters, if you didn't cast it from your hand, you lose the game. Whenever Phage deals combat damage to a creature, destroy that creature...

Morph {2}{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 this creature is turne...

Whenever this creature or another Zombie enters, all non-Zombie creatures get -1/-1 until end of turn.

Reach (This creature can block creatures with flying.)

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 this creature is turne...

Flying {1}: This creature becomes the creature type of your choice until end of turn. {2}{U}{U}, {T}: Choose a creature type. Each creature you con...

Mistform Ultimus is every creature type (even if this card isn't on the battlefield).

All Slivers have "{1}: This permanent becomes the creature type of your choice in addition to its other types until end of turn."

Flying {1}: This creature becomes the creature type of your choice until end of turn. Morph {1}{U} (You may cast this card face down as a 2/2 creat...

When this creature enters, draw a card.

Morph {2}{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 this creature is turne...

All Slivers have "{T}: Target Sliver creature gets +X/+0 until end of turn, where X is the number of Slivers on the battlefield."

First strike, haste Cycling {3} ({3}, Discard this card: Draw a card.)

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

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 this creatur...

At the beginning of each opponent's upkeep, if that player has two or fewer cards in hand, this creature deals 3 damage to that player.

Provoke (Whenever this creature attacks, you may have target creature defending player controls untap and block it if able.) This creature can't be...

At the beginning of your upkeep, sacrifice this creature unless you pay {G}{G}. Morph {7}{G}{G} (You may cast this card face down as a 2/2 creature...

Amplify 3 (As this creature enters, put three +1/+1 counters on it for each Dragon card you reveal in your hand.) Flying {T}: This creature deals d...

Flying {T}, Tap two untapped Birds you control: Return target permanent to its owner's hand.

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