Rank and File

When Rank and File enters, green creatures get -1/-1 until end of turn.

Meltdown

Destroy each artifact with mana value X or less.

Antagonism

At the beginning of each player’s end step, Antagonism deals 2 damage to that player unless one of their opponents was dealt damage this turn.

Sanctum Guardian

Sacrifice Sanctum Guardian: The next time a source of your choice would deal damage to any target this turn, prevent that damage.

Scrap

Destroy target artifact.
Cycling (, Discard this card: Draw a card.)

Disenchant

Destroy target artifact or enchantment.

Crystal Chimes

, , Sacrifice Crystal Chimes: Return all enchantment cards from your graveyard to your hand.

Brand

Gain control of all permanents you own. (This effect lasts indefinitely.)
Cycling (, Discard this card: Draw a card.)

Shattering Pulse

Buyback (You may pay an additional as you cast this spell. If you do, put this card into your hand as it resolves.)
Destroy target artifact.

Dismiss

Counter target spell.
Draw a card.

Skyshaper

Sacrifice Skyshaper: Creatures you control gain flying until end of turn.

Shattering Pulse

Buyback (You may pay an additional as you cast this spell. If you do, put this card into your hand as it resolves.)
Destroy target artifact.

Megrim

Whenever an opponent discards a card, Megrim deals 2 damage to that player.

Flame Wave

Flame Wave deals 4 damage to target player or planeswalker and each creature that player or that planeswalker’s controller controls.

Intruder Alarm

Creatures don’t untap during their controllers’ untap steps.
Whenever a creature enters, untap all creatures.

Havoc

Whenever an opponent casts a white spell, they lose 2 life.