Exile the top five cards of your library. An opponent separates those cards into two piles. You may play lands and cast spells from one of those piles. If you cast a spell this way, you cast it without paying its mana cost.

Flash (You may cast this spell any time you could cast an instant.)

Whenever you cast a spell during an opponent's turn, put a +1/+1 counter on Brineborn Cutthroat.

Counter target spell.

Madness (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.)

Flying

When Broodmate Dragon enters the battlefield, create a 4/4 red Dragon creature token with flying.

Buyback (You may pay an additional as you cast this spell. If you do, put this card into your hand as it resolves.)

Target opponent loses 2 life. You gain 2 life.

When Burglar Rat enters the battlefield, each opponent discards a card.

When Burning Sun's Avatar enters the battlefield, it deals 3 damage to target opponent or planeswalker and 3 damage to up to one target creature.

, : Target player reveals X cards from their hand and you choose one of them. That player discards that card. Activate only as a sorcery.

Counter target spell unless its controller pays .

Spell mastery — If there are two or more instant and/or sorcery cards in your graveyard, scry 2. (To scry 2, look at the top two cards of your library, then put any number of them on the bottom of your library and the rest on top in any order.)

Return up to two target creature cards with total mana value 3 or less from your graveyard to the battlefield. Put a deathtouch counter on either of them. Then put a menace counter on either of them.

Search your library for a planeswalker card, reveal it, put it into your hand, then shuffle.

Mountainwalk (This creature can't be blocked as long as defending player controls a Mountain.)

Whenever Captain Vargus Wrath attacks, Pirates you control get +1/+1 until end of turn for each time you've cast a commander from the command zone this game.

Enchant creature

At the beginning of your end step, clash with an opponent. If you win, gain control of enchanted creature. Otherwise, that player gains control of enchanted creature. (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.)

Constellation — Whenever an enchantment enters the battlefield under your control, tap target creature an opponent controls.

Enchant creature you don't control

Enchanted creature can't attack.

Whenever an opponent casts a spell, if it has a single target, change the target to enchanted creature if able.

Whenever a creature blocks, that creature's controller loses 1 life.

: Regenerate Carnage Gladiator.

Whenever Carrion Rats attacks or blocks, any player may exile a card from their graveyard. If a player does, Carrion Rats assigns no combat damage this turn.

Defender (This creature can't attack.)

When Carven Caryatid enters the battlefield, draw a card.

Target opponent reveals their hand. You choose a nonland card from it and exile that card.

, : Target player discards a card. Activate only as a sorcery.

Each player chooses from among the permanents they control an artifact, a creature, an enchantment, and a land, then sacrifices the rest.

Devoid (This card has no color.)

When Catacomb Sifter enters the battlefield, create a 1/1 colorless Eldrazi Scion creature token. It has "Sacrifice this creature: Add ."

Whenever another creature you control dies, scry 1. (Look at the top card of your library. You may put that card on the bottom of your library.)

Draw two cards, then discard a card.

Flashback costs you pay cost up to less.

Flashback costs your opponents pay cost more.

Tap two untapped Soldiers you control: Catapult Squad deals 2 damage to target attacking or blocking creature.

Gain control of target permanent until end of turn. Untap it. It gains haste until end of turn.

Fuse (You may cast one or both halves of this card from your hand.)

Fear (This creature can't be blocked except by artifact creatures and/or black creatures.)

, : Search your library for a Mercenary permanent card with mana value 4 or less, put it onto the battlefield, then shuffle.

Sacrifice a creature: Regenerate Cateran Overlord.

, : Search your library for a Mercenary permanent card with mana value 6 or less, put it onto the battlefield, then shuffle.

Swampwalk (This creature can't be blocked as long as defending player controls a Swamp.)

, : Search your library for a Mercenary permanent card with mana value 5 or less, put it onto the battlefield, then shuffle.

Goblins you control and Elementals you control have menace. (They can't be blocked except by two or more creatures.)

Whenever a creature enters the battlefield under your control, put a +1/+1 counter on each creature you control.

: Target player mills a card.

( can be paid with either or 2 life.)

Defender

When Cathedral Membrane dies during combat, it deals 6 damage to each creature it blocked this combat.

Cathedral of War enters the battlefield tapped.

Exalted (Whenever a creature you control attacks alone, that creature gets +1/+1 until end of turn.)

: Add .

When Cathodion dies, add .

: Add .

, : Add one mana of any color.

, , Sacrifice Cave of Temptation: Put two +1/+1 counters on target creature. Activate only as a sorcery.

Defender (This creature can't attack.)

Protection from black

Whenever Cephalid Aristocrat becomes the target of a spell or ability, mill two cards.

Destroy target creature. Its controller loses 2 life and you gain 2 life.

Infect (This creature deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.)

Chained Throatseeker can't attack unless defending player is poisoned.

Enchant land

Enchanted land has ", Discard a card: Gain control of target creature until end of turn."

Chandra's Defeat deals 5 damage to target red creature or red planeswalker. If that permanent is a Chandra planeswalker, you may discard a card. If you do, draw a card.

This spell costs less to cast, where X is the total amount of noncombat damage dealt to your opponents this turn.

Trample

Whenever a source you control deals noncombat damage to an opponent, Chandra's Incinerator deals that much damage to target creature or planeswalker that player controls.

When Channeler Initiate enters the battlefield, put three -1/-1 counters on target creature you control.

, Remove a -1/-1 counter from Channeler Initiate: Add one mana of any color.

Create a 1/1 green Squirrel creature token.

Flashback (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Whenever Cheering Fanatic attacks, choose a card name. Spells with the chosen name cost less to cast this turn.

When Chittering Rats enters the battlefield, target opponent puts a card from their hand on top of their library.

Target opponent chooses a number. You may have that player lose that much life. If you don't, that player sacrifices all but that many permanents.