Mirror Entity

Changeling (This card is every creature type.)
: Until end of turn, creatures you control have base power and toughness X/X and gain all creature types.

Guile

Guile can’t be blocked except by three or more creatures.
If a spell or ability you control would counter a spell, instead exile that spell and you may play that card without paying its mana cost.
When Guile is put into a graveyard from anywhere, shuffle it into its owner’s library.

Remand

Counter target spell. If that spell is countered this way, put it into its owner’s hand instead of into that player’s graveyard.
Draw a card.

Fanatic of Xenagos

Trample
Tribute 1 (As this creature enters the battlefield, an opponent of your choice may put a +1/+1 counter on it.)
When Fanatic of Xenagos enters the battlefield, if tribute wasn’t paid, it gets +1/+1 and gains haste until end of turn.

Goblin Rabblemaster

Other Goblin creatures you control attack each combat if able.
At the beginning of combat on your turn, create a 1/1 red Goblin creature token with haste.
Whenever Goblin Rabblemaster attacks, it gets +1/+0 until end of turn for each other attacking Goblin.

Sibsig Icebreakers

When Sibsig Icebreakers enters the battlefield, each player discards a card.

Great Teacher’s Decree

Creatures you control get +2/+1 until end of turn.
Rebound (If you cast this spell from your hand, exile it as it resolves. At the beginning of your next upkeep, you may cast this card from exile without paying its mana cost.)

Roast

Roast deals 5 damage to target creature without flying.

Mardu Scout

Dash (You may cast this spell for its dash cost. If you do, it gains haste, and it’s returned from the battlefield to its owner’s hand at the beginning of the next end step.)

Roast

Roast deals 5 damage to target creature without flying.

Aethersnipe

When Aethersnipe enters the battlefield, return target nonland permanent to its owner’s hand.
Evoke (You may cast this spell for its evoke cost. If you do, it’s sacrificed when it enters the battlefield.)

Ichor Slick

Target creature gets -3/-3 until end of turn.
Cycling (, Discard this card: Draw a card.)
Madness (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.)

Guile

Guile can’t be blocked except by three or more creatures.
If a spell or ability you control would counter a spell, instead exile that spell and you may play that card without paying its mana cost.
When Guile is put into a graveyard from anywhere, shuffle it into its owner’s library.

Enslave

Enchant creature
You control enchanted creature.
At the beginning of your upkeep, enchanted creature deals 1 damage to its owner.

Mutilate

All creatures get -1/-1 until end of turn for each Swamp you control.

Hideous End

Destroy target nonblack creature. Its controller loses 2 life.

Serra’s Embrace

Enchant creature
Enchanted creature gets +2/+2 and has flying and vigilance.

Wave of Vitriol

Each player sacrifices all artifacts, enchantments, and nonbasic lands they control. For each land sacrificed this way, its controller may search their library for a basic land card and put it onto the battlefield tapped. Then each player who searched their library this way shuffles it.