Tap an untapped Octopus you control: Tap target permanent.

: Tap all creatures without flying.

Defender

As long as there are two or more counters among creatures you control, Backstreet Bruiser can attack as though it didn't have defender.

You may choose not to untap Callous Oppressor during your untap step.

As Callous Oppressor enters, an opponent chooses a creature type.

: Gain control of target creature that isn't of the chosen type for as long as Callous Oppressor remains tapped.

: Target player draws two cards, then discards two cards.

Cephalid Facetaker can't be blocked.

At the beginning of combat on your turn, you may have Cephalid Facetaker become a copy of another target creature until end of turn, except it's 1/4 and has "This creature can't be blocked."

When this creature enters, surveil 3. (Look at the top three cards of your library, then put any number of them into your graveyard and the rest on top of your library in any order.)

Threshold — This creature can't be blocked as long as there are seven or more cards in your graveyard.

: Target player draws a card, then discards a card.

: Tap target creature without flying.

Flying

, Sacrifice a land: Draw a card.

At the beginning of your upkeep, put a shred counter on Cephalid Vandal. Then mill a card for each shred counter on Cephalid Vandal.

Flash

Emerge (You may cast this spell by sacrificing a creature and paying the emerge cost reduced by that creature's mana value.)

When you cast this spell, tap up to four target permanents.

Godhunter Octopus can't attack unless defending player controls an enchantment or an enchanted permanent.

When Llawan, Cephalid Empress enters, return all blue creatures your opponents control to their owners' hands.

Your opponents can't cast blue creature spells.

Whenever Marvo, Deep Operative attacks, clash with defending player. (Each clashing player reveals the top card of their library, then puts that card on the top or bottom. A player wins if their card had a higher mana value.)

Whenever you win a clash, draw a card. Then you may cast a spell from your hand with mana value 8 or less without paying its mana cost.

Flash

Lifelink

When Obscura Interceptor enters, it connives. When it connives this way, return up to one target spell to its owner's hand. (To have a creature connive, draw a card, then discard a card. If you discarded a nonland card, put a +1/+1 counter on that creature.)

When Octoprophet enters, scry 2. (Look at the top two cards of your library, then put any number of them on the bottom and the rest on top in any order.)

When Psychic Pickpocket enters, it connives. When it connives this way, return up to one target nonland permanent to its owner's hand. (To have a creature connive, draw a card, then discard a card. If you discarded a nonland card, put a +1/+1 counter on that creature.)

Menace (This creature can't be blocked except by two or more creatures.)

When Revel Ruiner enters, it connives. (Draw a card, then discard a card. If you discarded a nonland card, put a +1/+1 counter on this creature.)

Sealock Monster can't attack unless defending player controls an Island.

: Monstrosity 3. (If this creature isn't monstrous, put three +1/+1 counters on it and it becomes monstrous.)

When Sealock Monster becomes monstrous, target land becomes an Island in addition to its other types.

When Shield Broker enters, put a shield counter on target noncommander creature you don't control. You gain control of that creature for as long as it has a shield counter on it. (If it would be dealt damage or destroyed, remove a shield counter from it instead.)

Trample

Whenever Unruly Krasis attacks, you may have the base power and toughness of another target creature you control become X/X until end of turn, where X is Unruly Krasis's power.

: Adapt 3. (If this creature has no +1/+1 counters on it, put three +1/+1 counters on it.)