Whenever a player cycles a card, you may exile target creature. If you do, return that card to the battlefield under its owner's control at the beginning of the next end step.

Partner with Shabraz, the Skyshark (When this creature enters the battlefield, target player may put Shabraz into their hand from their library, then shuffle.)

Whenever you discard a card, put a +1/+1 counter on Brallin, Skyshark Rider and it deals 1 damage to each opponent.

{R}: Target Shark gains trample until end of turn.

Flash

When Cast Out enters the battlefield, exile target nonland permanent an opponent controls until Cast Out leaves the battlefield.

Cycling {W} ({W}, Discard this card: Draw a card.)

Whenever you draw a card, put a +1/+1 counter on Chasm Skulker.

When Chasm Skulker dies, create X 1/1 blue Squid creature tokens with islandwalk, where X is the number of +1/+1 counters on Chasm Skulker. (They can't be blocked as long as defending player controls an Island.)

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.)

If a source you control would deal damage to a permanent or player, it deals triple that damage instead.

{2}, {T}: Draw a card, then discard a card. Create a Treasure token. (It's an artifact with "{T}, Sacrifice this artifact: Add one mana of any color.")

Creatures you control get +1/+1 for each time you've cast your commander from the command zone this game.

{1}{B}, Exile one or more creature cards from your graveyard: Create a tapped X/X black Zombie Horror creature token, where X is twice the number of cards exiled this way.

Whenever you cycle a card, you may have Crystalline Resonance become a copy of another target permanent until your next turn, except it has this ability.

Whenever you discard a card, you may exile that card from your graveyard.

{2}, {T}: Draw a card, then discard a card.

{T}: Put a card exiled with Currency Converter into your graveyard. If it's a land card, create a Treasure token. If it's a nonland card, create a 2/2 black Rogue creature token.

Until end of turn, if one or more creatures would enter the battlefield from exile or after being cast from exile, their owners shuffle them into their libraries instead.

Cycling {2} ({2}, Discard this card: Draw a card.)

Delve (Each card you exile from your graveyard while casting this spell pays for {1}.)

Create X tapped 2/2 black Zombie creature tokens.

Whenever you cycle or discard a card, you may pay {1}. If you do, each opponent loses 2 life and you gain 2 life.

Whenever you discard a card, Feast of Sanity deals 1 damage to any target and you gain 1 life.

Ward {2} (Whenever this creature becomes the target of a spell or ability an opponent controls, counter it unless that player pays {2}.)

Three Autostubs -- Whenever another source you control deals exactly 1 damage to a permanent or player, Ghyrson Starn, Kelermorph deals 2 damage to that permanent or player.

Whenever you draw your second card each turn, each opponent loses 2 life and you gain 2 life.

When Gixian Puppeteer dies, return another target creature card with mana value 3 or less from your graveyard to the battlefield.

Draw two cards.

Cycling {U} ({U}, Discard this card: Draw a card.)

Commander creatures you own have "Creature tokens you control get +2/+2."

Creatures you control get +X/+X, where X is the number of cards you've drawn this turn.

Whenever you discard a card, you may pay {1}. If you do, amass 2. (Put two +1/+1 counters on an Army you control. If you don't control one, create a 0/0 black Zombie Army creature token first.)

{T}: Draw a card, then discard a card.

{4}, {T}: Transform Matzalantli, the Great Door. Activate only if there are four or more permanent types among cards in your graveyard. (Artifact, battle, creature, enchantment, land, and planeswalker are permanent types.)

(Transforms from Matzalantli.)

Fathomless descent -- {T}: Add X mana of any one color, where X is the number of permanent cards in your graveyard.

Whenever you draw your second card each turn, create a 1/1 blue Illusion creature token with "This creature gets +1/+0 for each other Illusion you control."

Whenever an Illusion you control dies, you may put a permanent card with mana value less than or equal to that creature's power from your hand onto the battlefield.

Mob Justice deals damage to target player or planeswalker equal to the number of creatures you control.

Whenever you draw a card, you may pay {1}. If you do, put a +1/+1 counter on Nadir Kraken and create a 1/1 blue Tentacle creature token.

Counter target spell.

Cycling {2} ({2}, Discard this card: Draw a card.)

Flash

Flying

Cycling {2}{U} ({2}{U}, Discard this card: Draw a card.)

When you cycle Nimble Obstructionist, counter target activated or triggered ability you don't control.

Psychosis Crawler's power and toughness are each equal to the number of cards in your hand.

Whenever you draw a card, each opponent loses 1 life.

Whenever you draw a card, target opponent loses 1 life and you gain 1 life.

Creature tokens you control have haste.

Whenever one or more creatures attack, you may pay {1}{R}. If you do, creatures attacking your opponents and/or planeswalkers they control get +2/+0 until end of turn.

Alliance -- Whenever another creature enters the battlefield under your control, create a Treasure token if this is the first or second time this ability has resolved this turn. Otherwise, you may pay {X}. When you do, Rose Room Treasurer deals X damage to any target.

Whenever equipped creature attacks alone, it gets +1/+1 until end of turn for each other creature you control.

Equip {1} ({1}: Attach to target creature you control. Equip only as a sorcery.)

Whenever you cycle a card, tap target creature an opponent controls.

When Starving Revenant enters the battlefield, surveil 2. Then for each card you put on top of your library, you draw a card and you lose 3 life.

Descend 8 -- Whenever you draw a card, if there are eight or more permanent cards in your graveyard, target opponent loses 1 life and you gain 1 life.

Draw two cards. Then discard a card unless there are five or more mana values among cards in your graveyard.

You lose X life and create X tapped Powerstone tokens. Then all creatures get -1/-1 until end of turn for each artifact you control. (The tokens are artifacts with "{T}: Add {C}. This mana can't be spent to cast a nonartifact spell.")

Flying

Whenever you draw a card, create a 1/1 blue and red Insect creature token with flying and haste.

{2}{U}{R}: Draw a card, then discard a card.

When The Locust God dies, return it to its owner's hand at the beginning of the next end step.

The Watcher in the Water enters the battlefield tapped with nine stun counters on it. (If a permanent with a stun counter would become untapped, remove one from it instead.)

Whenever you draw a card during an opponent's turn, create a 1/1 blue Tentacle creature token.

Whenever a Tentacle you control dies, untap up to one target Kraken and put a stun counter on up to one target nonland permanent.

Flash

When Wreck Hunter enters the battlefield, choose target player. You create a tapped Powerstone token for each nonland card in that player's graveyard that was put there from the battlefield this turn. (It's an artifact with "{T}: Add {C}. This mana can't be spent to cast a nonartifact spell.")