Onslaught

Until end of turn, whenever a player gains life, that player loses 2 life for each 1 life they gained.

({T}: Add {U}.)

{4}, {T}, Discard your hand: Draw a card for each creature you control.

Trample Heedless One's power and toughness are each equal to the number of Elves on the battlefield.

Whenever a player cycles a card, you may pay {1}. If you do, Lightning Rift deals 2 damage to any target.

({T}: Add {W}.)

{W}, {T}: Search your library for a land card, reveal it, put it into your hand, then shuffle. Activate only if an opponent controls more lands tha...

Morph {5}{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.)

{T}, Pay 1 life, Sacrifice Wooded Foothills: Search your library for a Mountain or Forest card, put it onto the battlefield, then shuffle.

({T}: Add {R}.)

({T}: Add {U}.)

Grand Coliseum enters the battlefield tapped. {T}: Add {C}. {T}: Add one mana of any color. Grand Coliseum deals 1 damage to you.

Untap all creatures and gain control of them until end of turn. They gain haste until end of turn.

Destroy target non-Zombie creature. It can't be regenerated. Return up to one target Zombie card from your graveyard to your hand.

When Symbiotic Beast dies, create four 1/1 green Insect creature tokens.

{T}: Sparksmith deals X damage to target creature and X damage to you, where X is the number of Goblins on the battlefield.

({T}: Add {W}.)

({T}: Add {R}.)

{U}{U}, Sacrifice a Wizard: Counter target spell. Morph {U} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time f...

({T}: Add {G}.)

Whenever a Beast enters the battlefield under your control, you may have it deal 4 damage to target opponent or planeswalker.

{T}, Pay 1 life, Sacrifice Windswept Heath: Search your library for a Forest or Plains card, put it onto the battlefield, then shuffle.

Whenever Ebonblade Reaper attacks, you lose half your life, rounded up. Whenever Ebonblade Reaper deals combat damage to a player, that player lose...