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Champion an Elf (When this creature enters, sacrifice it unless you exile another Elf you control. When this creature leaves the battlefield, that ...

Fear (This creature can't be blocked except by artifact creatures and/or black creatures.) When this creature enters, destroy target nonartifact, n...

Amplify 2 (As this creature enters, put two +1/+1 counters on it for each Beast card you reveal in your hand.) Provoke (Whenever this creature atta...

Lands you control have "{T}: Add one mana of any color." {T}: Add one mana of any color.

You have no maximum hand size. {T}: Add {C}.

Xantcha enters under the control of an opponent of your choice. Xantcha attacks each combat if able and can't attack its owner or planeswalkers its...

This land enters tapped. {T}: Add one mana of any color in your commander's color identity. When that mana is spent to cast a creature spell that s...

You have no maximum hand size. {T}: Add {C}.

{3}{U}, {T}, Discard a card: Untap target creature and gain control of it until end of turn. That creature gains haste until end of turn.

Other tapped creatures you control have deathtouch. Other untapped creatures you control have hexproof. {1}, {T}: Untap another target creature or ...

Flying Other Spirits you control get +1/+1. Spells you cast from your graveyard cost {1} less to cast.

Flying, lifelink Whenever another nontoken creature you control dies, return that card to its owner's hand at the beginning of the next end step. I...

Pay 1 life, Sacrifice another creature: Create a Treasure token. (It's an artifact with "{T}, Sacrifice this token: Add one mana of any color.")

As this artifact enters, choose a creature type. Creature spells of the chosen type cost {2} less to cast.

Imprint — When this land enters, you may exile a colorless card with mana value 7 or greater from your hand. {T}: Add {C}. If a card is exiled with...

Landfall — Whenever a land you control enters, create a 0/1 green Plant creature token. If you control seven or more lands with different names, cr...

({T}: Add {W}.)

{3}: Exile another target creature you control, then return it to the battlefield under its owner's control. Whenever another creature you control ...

Whenever this creature attacks, reveal the top card of your library and put it into your hand. You lose life equal to that card's mana value if thi...

Haste Whenever Calamity attacks while saddled, choose a nonlegendary creature that saddled it this turn and create a tapped and attacking token tha...

Flying Whenever an opponent draws a card except the first one they draw in each of their draw steps, create a 1/1 green Snake creature token. Whene...

Sacrifice this creature: Search your library for a basic land card, put that card onto the battlefield tapped, then shuffle.

Landfall — Whenever a land you control enters, add one mana of any color.

{G}{U}: Target creature can't be blocked this turn. If that creature is a Snake, it gets +2/+2 until end of turn.