You may have this creature enter as a copy of any creature card in a graveyard.

You may have this creature enter as a copy of any creature on the battlefield.

At the beginning of your upkeep, you may have this creature become a copy of another target creature, except it has this ability.

Create a token that's a copy of target creature you control. Flashback {5}{U}{U} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

You may have this enchantment enter as a copy of any enchantment on the battlefield.

Level up {1}{U} ({1}{U}: Put a level counter on this. Level up only as a sorcery.) LEVEL 2-3 2/4 {U}{U}, {T}: Copy target instant or sorcery spell. You may choose new targets for the copy. LEVEL 4+ 2/5 {U}{U}, {T}: Copy target instant or sorcery spell twice. You may choose new targets for the copies.

Create a token that's a copy of target creature you control. If it's your turn, scry 2.

Imprint — When this artifact enters, you may exile an instant card with mana value 2 or less from your hand. {2}, {T}: You may copy the exiled card. If you do, you may cast the copy without paying its mana cost.

You may have this Equipment enter as a copy of any Equipment on the battlefield.

Kicker {5} (You may pay an additional {5} as you cast this spell.) Create a token that's a copy of target creature. If this spell was kicked, create five of those tokens instead.

Counter target spell. If that spell is countered this way, exile it instead of putting it into its owner's graveyard.

Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.) Indestructible (Damage and effects that say "destroy" don't destroy this creature.) If Darksteel Colossus would be put into a graveyard from anywhere, reveal Darksteel Colossus and shuffle it into its owner's library instead.

{T}: Draw three cards. {2}{U}{U}: Return Arcanis to its owner's hand.

Each player shuffles their hand and graveyard into their library, then draws seven cards. If it's your turn, end the turn. (Exile all spells and abilities from the stack, including this card. Discard down to your maximum hand size. Damage wears off, and "this turn" and "until end of turn" effects end.)

Draw cards equal to the number of cards in your library, then put a card from your hand on top of your library. You have no maximum hand size until your next turn.

Flash At the beginning of your end step, draw seven cards. Each opponent's maximum hand size is reduced by seven.

Draw X cards.

Look at the top three cards of your library, then put them back in any order. You may shuffle. Draw a card.

Whenever an opponent casts a spell, you may draw a card unless that player pays {1}.

Hexproof (This creature can't be the target of spells or abilities your opponents control.) This creature can't be blocked.

({T}: Add {U}.)

Flying Creatures you control have "Whenever this creature becomes the target of a spell or ability for the first time each turn, counter that spell or ability."

If this card is in your opening hand, you may begin the game with it on the battlefield. You may cast spells as though they had flash.

Flying You can't lose the game and your opponents can't win the game.

You may choose new targets for target spell.

Trample {5}: Permanents you control gain indestructible until end of turn. {5}, Exile this card from your graveyard: Permanents you control gain indestructible until end of turn.

Equipped creature has hexproof and haste. (It can't be the target of spells or abilities your opponents control. It can attack and {T} no matter when it came under your control.) Equip {1} ({1}: Attach to target creature you control. Equip only as a sorcery.)

Equipped creature can't be blocked and has shroud. (It can't be the target of spells or abilities.) Equip {2}

You may have this enchantment enter as a copy of any artifact on the battlefield, except it's an enchantment in addition to its other types.

{3}, {T}: Double the amount of each type of unspent mana you have.

Instant and sorcery spells you cast cost {1} less to cast. Whenever you cast an instant or sorcery spell, scry 1.

You may cast spells from your hand without paying their mana costs.

Blue spells you cast cost {1} less to cast.

Equipped creature gets +2/+2 and has protection from black and from green. Whenever equipped creature deals combat damage to a player, that player discards a card and you untap all lands you control. Equip {2}

{2}, {T}: You gain 5 life. Shuffle this artifact and your graveyard into their owner's library.

For each attacking creature, its owner puts it on their choice of the top or bottom of their library.

Choose one — • Counter target spell. • Target player draws two cards. • Gain control of target nonland permanent with mana value 1 or less.

Enchant creature You control enchanted creature.

Counter target spell. You may cast a spell that shares a card type with it from your hand without paying its mana cost.

Counter target spell.

Each creature your opponents control is an Illusion in addition to its other types and has "When this creature becomes the target of a spell or ability, sacrifice it."

Return all creatures to their owners' hands.

+4: Target player exiles a card from their hand. −3: Exile target permanent. −14: Restart the game, leaving in exile all non-Aura permanent cards exiled with Karn. Then put those cards onto the battlefield under your control.

Counter target spell. At the beginning of your next main phase, add an amount of {C} equal to that spell's mana value.

Until end of turn, each creature target player controls loses all abilities and becomes a blue Frog with base power and toughness 1/1.

Counter target spell. Untap up to four lands.

Counter target enchantment, instant, or sorcery spell. Its controller creates a 2/2 blue Bird creature token with flying.

Until end of turn, target creature loses all abilities and becomes a blue Frog with base power and toughness 1/1.

{2}{U}, {T}: Put this creature and target creature on top of their owners' libraries, then those players shuffle their libraries.

Gain control of target spell. You may choose new targets for it. (If that spell becomes a permanent, it enters under your control.)

Target player gains control of up to three target nonattacking creatures until end of turn. Untap those creatures. They block this turn if able.

{3}, {T}: Create a token that's a copy of this creature.

Imprint — When this artifact enters, you may exile a creature card from your hand. {X}, {T}: Create a token that's a copy of the exiled card. X is the mana value of that card.