Commander creatures you own have ": This creature becomes a copy of another target creature."

At the beginning of each opponent's upkeep, that player reveals the top card of their library. If it's a creature card, the player puts the card into their graveyard and this enchantment becomes a copy of that card. (If it does, it loses this ability.)

If a player would draw a card, that player exiles the top card of one of their opponents' libraries face down instead.
Each player may look at cards they exiled with this enchantment, and they may play lands and cast spells from among those cards.

Whenever you cast a noncreature spell, create an X/X blue Shark creature token with flying, where X is that spell's mana value.
Cycling
When you cycle this card, create an X/X blue Shark creature token with flying.

Enchant creature
Enchanted creature gets -3/-0.
: Put enchanted creature into its owner's library third from the top.

As this enchantment enters, choose a color.
All nonland permanents are the chosen color.

As this enchantment enters, choose a land type.
Each land of the chosen type has phasing.

Enchant creature
Enchanted creature has flying.
: Return this Aura to its owner's hand.

Flash
Enchant artifact or creature
As long as enchanted permanent is a creature, it gets -3/-0 and loses flying.

When this enchantment enters, draw three cards, then discard two cards.
At the beginning of your end step, if eight or more cards are in your graveyard, transform this enchantment.

Enchant creature
Whenever enchanted creature deals damage to a player, return target creature that player controls to its owner's hand.

When Signature Spells enters, seek two instant and/or sorcery cards with mana value 3, then exile them.
At the beginning of your upkeep, you may copy a card exiled with Signature Spells. You may cast the copy without paying its mana cost.

Enchant creature
When this Aura enters, tap enchanted creature.
Enchanted creature doesn't untap during its controller's untap step.
Enchanted creature has ": Untap this creature."

Enchant creature
Enchanted creature doesn't untap during its controller's untap step.
Enchanted creature has ", Put a -1/-1 counter on this creature: Untap this creature."

Enchant creature
When this Aura enters, draw a card.
Enchanted creature has ": Target creature becomes the color of your choice until end of turn."

Enchant land
Enchanted land has ": Target creature gains flying until end of turn. Activate only as a sorcery."

Whenever you cast a noncreature spell, you may pay . If you do, create a 2/2 blue Djinn Monk creature token with flying.

Enchant creature
When this Aura enters, tap enchanted creature.
Enchanted creature doesn't untap during its controller's untap step.
When enchanted creature is dealt damage, sacrifice this Aura.

Enchant creature
When this Aura enters, tap enchanted creature.
Enchanted creature doesn't untap during its controller's untap step.

Enchant creature
When this Aura enters, tap enchanted creature and you create a 1/1 blue Fish creature token with "This token can't be blocked."
Enchanted creature doesn't untap during its controller's untap step.

Enchant creature
When this Aura enters, tap enchanted creature.
Enchanted creature doesn't untap during its controller's untap step.
When enchanted creature becomes the target of a spell or ability, sacrifice this Aura.

Flash
Enchant creature
Enchanted creature gets -4/-0.

Enchant creature
At the beginning of the upkeep of enchanted creature's controller, that player sacrifices that creature unless they pay .
When this Aura is put into a graveyard from the battlefield, return it to its owner's hand.

Enchant creature
Enchanted creature gets +1/+1 and has flying.
When a Ninja you control enters, you may return this card from your graveyard to the battlefield attached to that creature.

(You may cast either half. That door unlocks on the battlefield. As a sorcery, you may pay the mana cost of a locked door to unlock it.)
When you unlock this door, create an X/X blue Spirit creature token with flying, where X is the number of unlocked doors among Rooms you control.

Enchant creature
Enchanted creature has flying.
Enchanted creature has first strike as long as it's blocking and you control a snow land.

Cumulative upkeep
Whenever an Island is tapped for mana, its controller may add an additional . If that Island is snow, its controller may add an additional instead. Spend this mana only to pay cumulative upkeep costs.

Enchant creature
When this Aura enters, if you control a token, tap enchanted creature, then scry 2.
Enchanted creature doesn't untap during its controller's untap step.

Flash
Enchant creature
Enchanted creature gets -2/-0. It gets -6/-0 instead as long as its controller has seven or more cards in their graveyard.

You may cast this spell as though it had flash. If you cast it any time a sorcery couldn't have been cast, the controller of the permanent it becomes sacrifices it at the beginning of the next cleanup step.
Enchant creature
Enchanted creature gets +0/+1 and has flying.