Creatures you control have flying.
Creatures your opponents control lose flying and can't have or gain flying.

Flying
Ward
When this creature enters, scry 2.

Convoke
Choose one or both —
• Counter target spell.
• Draw two cards, then discard a card.

You may have this creature enter as a copy of any creature on the battlefield, except it isn't legendary, is an artifact in addition to its other types, and has myriad.

Exile a creature card from your graveyard and pay its mana cost: Create a token that's a copy of that card. Activate only as a sorcery.

Draw three cards. Creatures your opponents control get -3/-0 until end of turn.

For each opponent, gain control of up to one target artifact that player controls.

: An opponent tells you a statement about themselves and secretly notes whether it's true or false. You guess which it is. If you guessed correctly, Blufferfish gets +2/+0 and can't be blocked this turn.

Draw four cards.
Cycling

Morph
When this creature is turned face up, each opponent skips their next untap step.

Return up to two target creatures to their owners' hands. Draw two cards, then discard a card.

Return up to three target creatures to their owners' hands.

Flying
: This creature's owner shuffles it into their library.

Look at target opponent's sideboard. You may cast a card from that sideboard without paying its mana cost.
Exile Command the Chaff.

This spell can't be countered.
Draw two cards, then amass Zombies X, where X is the number of cards in your hand.

Aftermath
Each player shuffles their hand and graveyard into their library, then draws seven cards.

Enchant permanent
You control enchanted permanent.

Flying
Whenever an opponent draws a card, you may draw two cards.

Draw cards equal to the number of instant and sorcery cards in your graveyard.

Flying
Descend 4 — When this creature enters, if there are four or more permanent cards in your graveyard, return up to one target nonland permanent other than this creature to its owner's hand.

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

Surge
Return all nonland permanents to their owners' hands. If this spell's surge cost was paid, create an 8/8 blue Octopus creature token.

Choose any number of creatures target player controls. Choose the same number of creatures another target player controls. Those players exchange control of those creatures. (This effect lasts indefinitely.)

This spell can't be countered.
Flying
When this creature enters, look at the top five cards of your library and separate them into a face-down pile and a face-up pile. An opponent chooses one of those piles. Put that pile into your hand and the other into your graveyard.

Casualty 2
Target player mills half their library, rounded down.

Vigilance
Islandcycling

When this creature enters, you may cast target instant or sorcery card with mana value 4 or less from your graveyard without paying its mana cost. If that spell would be put into your graveyard, exile it instead.

Soulbond
As long as Deadeye Navigator is paired with another creature, each of those creatures has ": Exile this creature, then return it to the battlefield under your control."

Strange new worlds — Draw X cards, where X is the number of differently named lands you control. You have no maximum hand size until your next turn.

This creature can't attack unless defending player controls an Island.