Return all attacking creatures to their owner's hand.

Menace

As Arcane Adaptation enters the battlefield, choose a creature type.

Creatures you control are the chosen type in addition to their other types. The same is true for creature spells you control and creature cards you own that aren't on the battlefield.

Counter target spell. Its controller may draw up to two cards at the beginning of the next turn's upkeep.

You draw a card at the beginning of the next turn's upkeep.

At the beginning of each end step, if you drew two or more cards this turn, you may put a quest counter on Archmage Ascension.

As long as Archmage Ascension has six or more quest counters on it, if you would draw a card, you may instead search your library for a card, put that card into your hand, then shuffle.

Whenever a creature you control deals combat damage to a player, you may draw a card.

{1}{U}, {T}: Creatures your opponents control attack this turn if able.

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

Blighted Agent can't be blocked.

{T}: Add {C}.

{5}{U}, {T}, Sacrifice Blighted Cataract: Draw two cards.

At the beginning of each end step, if an opponent lost 2 or more life this turn, you may put a quest counter on Bloodchief Ascension. (Damage causes loss of life.)

Whenever a card is put into an opponent's graveyard from anywhere, if Bloodchief Ascension has three or more quest counters on it, you may have that player lose 2 life. If you do, you gain 2 life.

Equipped creature gets +2/+0 and has shroud. (It can't be the target of spells or abilities.)

Whenever a Rogue creature enters the battlefield, you may attach Cloak and Dagger to it.

Equip {3}

{T}: Add one mana of any color in your commander's color identity.

Counter target noncreature spell. Its controller loses 2 life.

As Cover of Darkness enters the battlefield, choose a creature type.

Creatures of the chosen type have fear. (They can't be blocked except by artifact creatures and/or black creatures.)

Search your library for a card, put that card into your hand, then shuffle.

Spell mastery -- If there are two or more instant and/or sorcery cards in your graveyard, add {B}{B}{B}.

{1}, {T}: Add {U}{B}.

Deathcult Rogue can't be blocked except by Rogues.

Flash

Flying

When Dewdrop Spy enters the battlefield, look at the top card of target player's library.

Dimir Aqueduct enters the battlefield tapped.

When Dimir Aqueduct enters the battlefield, return a land you control to its owner's hand.

{T}: Add {U}{B}.

{T}: Add {U} or {B}.

{U}{B}: Dimir Keyrune becomes a 2/2 blue and black Horror artifact creature until end of turn and can't be blocked this turn.

{1}, {T}: Add {U}{B}.

Counter target spell with mana value 4 or greater.

Destroy target nonblack creature.

Drowned Catacomb enters the battlefield tapped unless you control an Island or a Swamp.

{T}: Add {U} or {B}.

Prowl {2}{B} (You may cast this for its prowl cost if you dealt combat damage to a player this turn with a Goblin or Rogue.)

When Earwig Squad enters the battlefield, if its prowl cost was paid, search target opponent's library for three cards and exile them. Then that player shuffles.

{T}: Add {C}.

{1}, {T}, Sacrifice Esper Panorama: Search your library for a basic Plains, Island, or Swamp card, put it onto the battlefield tapped, then shuffle.

Ascend (If you control ten or more permanents, you get the city's blessing for the rest of the game.)

Return target nonland permanent to its owner's hand. If you have the city's blessing, you may put that permanent on top of its owner's library instead.

({T}: Add {U} or {B}.)

Fetid Pools enters the battlefield tapped.

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

Haste

Goblin spells and Rogue spells you cast cost {1} less to cast.

{T}: Add {C}.

{2}, {T}: Each player draws a card, then discards a card.

Flying

Other blue creatures you control get +1/+1.

Other black creatures you control get +1/+1.

Scry 2, then draw two cards. You get {E}{E} (two energy counters).

Destroy target nonartifact creature.

{T}: Add {C}.

{1}, {T}, Sacrifice Grixis Panorama: Search your library for a basic Island, Swamp, or Mountain card, put it onto the battlefield tapped, then shuffle.

Counter target spell. If that spell is countered this way, put that card on the top or bottom of its owner's library instead of into that player's graveyard.

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

{2}{U}{B}: Each unblocked creature has base power and toughness 4/1 until end of turn.

Hexproof (This creature can't be the target of spells or abilities your opponents control.)

Invisible Stalker can't be blocked.

When Keeper of Keys enters the battlefield, you become the monarch.

At the beginning of your upkeep, if you're the monarch, creatures you control can't be blocked this turn.

Choose a creature type. Destroy all creatures that aren't of the chosen type.

Ascend (If you control ten or more permanents, you get the city's blessing for the rest of the game.)

At the beginning of your upkeep, each player draws a card. If you have the city's blessing, instead only you draw a card.

Whenever a creature you control deals combat damage to a player, that player discards a card.

Flying

Prowl {2}{U} (You may cast this for its prowl cost if you dealt combat damage to a player this turn with a Faerie or Rogue.)

When Latchkey Faerie enters the battlefield, if its prowl cost was paid, draw a card.

Counter target spell unless its controller pays {3}.

Marang River Prowler can't block and can't be blocked.

You may cast Marang River Prowler from your graveyard as long as you control a black or green permanent.

Dethrone (Whenever this creature attacks the player with the most life or tied for most life, put a +1/+1 counter on it.)

Whenever Marchesa's Infiltrator deals combat damage to a player, draw a card.

Equipped creature has fear. (It can't be blocked except by artifact creatures and/or black creatures.)

Whenever equipped creature deals combat damage to a player, you may draw a card.

Equip {2}

Whenever an opponent loses life, that player mills that many cards. (Damage causes loss of life.)

You draw two cards and you lose 2 life.

Flash

If an opponent would draw a card except the first one they draw in each of their draw steps, instead that player skips that draw and you draw a card.

Prowl {5}{U} (You may cast this for its prowl cost if you dealt combat damage to a player this turn with a Rogue.)

Create X 1/1 black Faerie Rogue creature tokens with flying, where X is the damage dealt to your opponents this turn. If this spell's prowl cost was paid, take an extra turn after this one.

Flying

Each other Rogue creature you control enters the battlefield with an additional +1/+1 counter on it.

Whenever a creature you control with a +1/+1 counter on it deals combat damage to a player, that player discards a card.

As Palace Siege enters the battlefield, choose Khans or Dragons.

• Khans -- At the beginning of your upkeep, return target creature card from your graveyard to your hand.

• Dragons -- At the beginning of your upkeep, each opponent loses 2 life and you gain 2 life.

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

Whenever Pulse Tracker attacks, each opponent loses 1 life.

{T}: Add {C}.

{4}, {T}: Target creature can't be blocked this turn.

Ascend (If you control ten or more permanents, you get the city's blessing for the rest of the game.)

As long as you have the city's blessing, Slippery Scoundrel has hexproof and can't be blocked.

Slither Blade can't be blocked.

Counter target spell. If that spell is countered this way, put it on the bottom of its owner's library instead of into that player's graveyard. Put Spell Crumple on the bottom of its owner's library.

Whenever Stealer of Secrets deals combat damage to a player, draw a card.

Prowl {1}{B} (You may cast this for its prowl cost if you dealt combat damage to a player this turn with a Goblin or Rogue.)

Whenever a Rogue you control attacks and isn't blocked, it gets +2/+1 until end of turn.

({T}: Add {U} or {B}.)

Sunken Hollow enters the battlefield tapped unless you control two or more basic lands.

Counter target enchantment, instant, or sorcery spell. Its controller creates a 2/2 blue Bird creature token with flying.

At the beginning of each end step, if an opponent lost 3 or more life this turn, you may draw a card. (Damage causes loss of life.)

Indestructible

As long as your devotion to blue is less than five, Thassa isn't a creature. (Each {U} in the mana costs of permanents you control counts toward your devotion to blue.)

At the beginning of your upkeep, scry 1.

{1}{U}: Target creature you control can't be blocked this turn.

Draw a card.

Flashback {2}{U} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Triton Shorestalker can't be blocked.

Counter target spell. Its controller loses 3 life.

Skulk (This creature can't be blocked by creatures with greater power.)

Lifelink (Damage dealt by this creature also causes you to gain that much life.)

When Warren Pilferers enters the battlefield, return target creature card from your graveyard to your hand. If that card is a Goblin card, Warren Pilferers gains haste until end of turn.