Legions

{B}, Pay 1 life: Add one mana of any color.

{1}: Exile target card from a graveyard.

{1}{B}, {T}, Sacrifice a creature: Search your library for a Zombie card and a Swamp card, reveal them, and put them into your hand. Then shuffle y...

All Sliver creatures have provoke. (Whenever a Sliver attacks, its controller may have target creature defending player controls untap and block it...

Flying Tap two untapped Birds you control: Draw a card. Tap two untapped Wizards you control: Target creature gains flying until end of turn.

Slivers can't be blocked except by Slivers.

All Slivers have "{T}: Regenerate target Sliver."

Whenever another nontoken Elf enters the battlefield, you may create a 1/1 green Insect creature token.

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

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

When Goblin Firebug leaves the battlefield, sacrifice a land.

{T}, Sacrifice a Goblin: Goblin creatures get +2/+0 until end of turn.

All Sliver creatures have "{2}: This creature gets +1/+1 until end of turn."

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

At the beginning of your upkeep, you draw X cards and you lose X life, where X is the number of Zombies you control.

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

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 Master of the Veil is ...

All Sliver creatures get +0/+1.

Cycling {B}{B} ({B}{B}, Discard this card: Draw a card.) When you cycle Gempalm Polluter, you may have target player lose life equal to the number ...

Flying {1}: Mistform Seaswift 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 c...

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

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

{T}, Sacrifice a Forest: Add three mana in any combination of {R} and/or {G}.