When this creature enters, target creature can't block this turn.

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: This artifact becomes a 4/4 black and red Dragon artifact creature with flying until end of turn.

Target creature deals damage to itself equal to its power.

Graft 4 (This creature enters with four +1/+1 counters on it. Whenever another creature enters, you may move a +1/+1 counter from this creature onto it.)
, Remove two +1/+1 counters from among creatures you control: Draw a card.

When this enchantment enters, create a 4/4 blue Octopus Performer creature token named Contortionist with "At the beginning of your upkeep, you may fold this token in half." (It becomes 2/2, then 1/1, ½/½, and so on.)
Sacrifice this enchantment: Draw a card and an additional card for each of Contortionist's folds.

Until end of turn, target creature you control gets +3/+3 and other creatures you control get +1/+1.

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Flash (You may cast this spell any time you could cast an instant.)
Enchant creature
Enchanted creature gets -4/-0.

Each historic card in your hand has cycling . (, Discard that card: Draw a card.)
Whenever you cycle a card, put a +1/+1 counter on Jo Grant.
Doctor's companion (You can have two commanders if the other is the Doctor.)

You and permanents you control gain hexproof until end of turn. Prevent all damage that black and/or red sources would deal to creatures you control this turn.

As this land enters, you may reveal an Island or Swamp card from your hand. If you don't, this land enters tapped.
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Vigilance

When this creature becomes the target of a spell or ability, sacrifice it.

Destroy target creature.

: Tap target creature. Activate only if you had a creature enter the battlefield under your control this turn.

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This land enters tapped unless you control two or more basic lands.

You gain 3 life.
Splice onto Arcane (As you cast an Arcane spell, you may reveal this card from your hand and pay its splice cost. If you do, add this card's effects to that spell.)

Repeating Barrage deals 3 damage to any target.
Raid — : Return this card from your graveyard to your hand. Activate only if you attacked this turn.

Whenever an opponent activates an ability of an artifact, creature, or land that isn't a mana ability, this creature deals 1 damage to that player.
: This creature gets +3/+3 and gains menace until end of turn.