Ninjutsu {2}{U}{B} ({2}{U}{B}, Return an unblocked attacker you control to hand: Put this card onto the battlefield from your hand tapped and attacking.) Whenever Fallen Shinobi deals combat damage to a player, that player exiles the top two cards of their library. Until end of turn, you may play those cards without paying their mana costs.

Deathtouch Whenever Grave Titan enters the battlefield or attacks, create two 2/2 black Zombie creature tokens.

Ward {2} (Whenever this creature becomes the target of a spell or ability an opponent controls, counter it unless that player pays {2}.) At the beginning of your end step, if you have the initiative, draw a card. Draw another card if you've completed a dungeon. Choose a Background (You can have a Background as a second commander.)

Ninjutsu {3}{B}{B} ({3}{B}{B}, Return an unblocked attacker you control to hand: Put this card onto the battlefield from your hand tapped and attacking.) Whenever Ink-Eyes, Servant of Oni deals combat damage to a player, you may put target creature card from that player's graveyard onto the battlefield under your control. {1}{B}: Regenerate Ink-Eyes.

Deathtouch When Rilsa Rael, Kingpin enters the battlefield, you take the initiative. Whenever you attack, target attacking creature gains deathtouch until end of turn. If you've completed a dungeon, that creature also gets +5/+0 and gains first strike and menace until end of turn.

Ninjutsu {1}{U} ({1}{U}, Return an unblocked attacker you control to hand: Put this card onto the battlefield from your hand tapped and attacking.) You may have Sakashima's Student enter the battlefield as a copy of any creature on the battlefield, except it's a Ninja in addition to its other creature types.

When Seasoned Dungeoneer enters the battlefield, you take the initiative. Whenever you attack, target attacking Cleric, Rogue, Warrior, or Wizard gains protection from creatures until end of turn. It explores. (Reveal the top card of your library. Put that card into your hand if it's a land. Otherwise, put a +1/+1 counter on the creature, then put the card back or put it into your graveyard.)

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.

When Tomb of Horrors Adventurer enters the battlefield, you take the initiative. Whenever you cast your second spell each turn, copy it. If you've completed a dungeon, copy that spell twice instead. You may choose new targets for the copies. (A copy of a permanent spell becomes a token.)

Flying Whenever you cycle or discard another card, scry 1. Cycling {U} ({U}, Discard this card: Draw a card.)

Flying, deathtouch When Baleful Strix enters the battlefield, draw a card.

Flying When Cloudblazer enters the battlefield, you gain 2 life and draw two cards.

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

Flying When Mulldrifter enters the battlefield, draw two cards. Evoke {2}{U} (You may cast this spell for its evoke cost. If you do, it's sacrificed when it enters the battlefield.)

Flying Whenever another creature dies, you may draw a card. If you do, discard a card.

{T}: Draw a card, then discard a card. {2}{U}{B}, {T}, Sacrifice Obsessive Stitcher: Return target creature card from your graveyard to the battlefield.

Whenever you attack, investigate. (Create a Clue token. It's an artifact with "{2}, Sacrifice this artifact: Draw a card.") Whenever you sacrifice a Clue, venture into the dungeon. (Enter the first room or advance to the next room.)

Arcane Sanctum enters the battlefield tapped. {T}: Add {W}, {U}, or {B}.

As Choked Estuary enters the battlefield, you may reveal an Island or Swamp card from your hand. If you don't, Choked Estuary enters the battlefield tapped. {T}: Add {U} or {B}.

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

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

{T}, Sacrifice Evolving Wilds: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.

{T}: Add one mana of any color that a land an opponent controls could produce.

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

{T}: Add {C}. {T}, Sacrifice a creature: You gain 1 life.

({T}: Add {U}.)

{T}: Add {C}. {T}: Add {W}. Activate only if you control an Island. {T}: Add {U}. Activate only if you control a Plains.

{T}: Add {C}. {2}, {T}: Choose a color. Add an amount of mana of that color equal to your devotion to that color. (Your devotion to a color is the number of mana symbols of that color in the mana costs of permanents you control.)

({T}: Add {W}.)

As Port Town enters the battlefield, you may reveal a Plains or Island card from your hand. If you don't, Port Town enters the battlefield tapped. {T}: Add {W} or {U}.

({T}: Add {W} or {U}.) Prairie Stream enters the battlefield tapped unless you control two or more basic lands.

({T}: Add {U} or {B}.) Sunken Hollow enters the battlefield tapped unless you control two or more basic lands.

({T}: Add {B}.)

{T}, Sacrifice Terramorphic Expanse: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.

Thriving Heath enters the battlefield tapped. As Thriving Heath enters the battlefield, choose a color other than white. {T}: Add {W} or one mana of the chosen color.

Thriving Isle enters the battlefield tapped. As Thriving Isle enters the battlefield, choose a color other than blue. {T}: Add {U} or one mana of the chosen color.

Equipped creature has haste and shroud. (It can't be the target of spells or abilities.) Equip {0}

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

{3}, Sacrifice Burnished Hart: Search your library for up to two basic land cards, put them onto the battlefield tapped, then shuffle.

{T}: Add one mana of any color in your commander's color identity. Sacrifice Commander's Sphere: Draw a card.

{T}, Remove a component counter from Component Pouch: Add two mana of different colors. {T}: Roll a d20. 1—9 | Put a component counter on Component Pouch. 10—20 | Put two component counters on Component Pouch.

{T}: Add {C}. {3}, {T}: Venture into the dungeon. Activate only as a sorcery. (Enter the first room or advance to the next room.)

{T}: Add one mana of any color that a land an opponent controls could produce.

{T}: Add {C}{C}.

When Solemn Simulacrum enters the battlefield, you may search your library for a basic land card, put that card onto the battlefield tapped, then shuffle. When Solemn Simulacrum dies, you may draw a card.

{B}, {T}, Sacrifice Doomed Necromancer: Return target creature card from your graveyard to the battlefield.

Flying, protection from black Echo {3}{W}{W} (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.) When Karmic Guide enters the battlefield, return target creature card from your graveyard to the battlefield.

Roll a d20 and add the number of creature cards in your graveyard that were put there from the battlefield this turn. 1—14 | Return all creature cards in your graveyard that were put there from the battlefield this turn to your hand. 15+ | Return those cards from your graveyard to the battlefield.

Whenever a player casts an instant or sorcery spell, exile it instead of putting it into a graveyard as it resolves. {X}, {T}, Sacrifice Rod of Absorption: You may cast any number of spells from among cards exiled with Rod of Absorption with total mana value X or less without paying their mana costs.

Vigilance Whenever Sun Titan enters the battlefield or attacks, you may return target permanent card with mana value 3 or less from your graveyard to the battlefield.

Return target creature card from your graveyard to the battlefield. Flashback {3}{W} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Flying When Ashen Rider enters the battlefield or dies, exile target permanent.

Vigilance When Cataclysmic Gearhulk enters the battlefield, each player chooses an artifact, a creature, an enchantment, and a planeswalker from among the nonland permanents they control, then sacrifices the rest.

Exile target permanent with mana value 4 or greater.

When Hostage Taker enters the battlefield, exile another target creature or artifact until Hostage Taker leaves the battlefield. You may cast that card for as long as it remains exiled, and mana of any type can be spent to cast that spell.

You may choose not to untap Immovable Rod during your untap step. Whenever Immovable Rod becomes untapped, venture into the dungeon. {3}{W}, {T}: For as long as Immovable Rod remains tapped, another target permanent loses all abilities and can't attack or block.

When Meteor Golem enters the battlefield, destroy target nonland permanent an opponent controls.

Destroy all creatures, then return a creature card put into a graveyard this way to the battlefield under your control. It's a black Zombie in addition to its other colors and types. Exile Necromantic Selection.

All Slivers have "{3}, Sacrifice this permanent: Destroy target permanent."

When Plaguecrafter enters the battlefield, each player sacrifices a creature or planeswalker. Each player who can't discards a card.

Sacrifice Ronom Unicorn: Destroy target enchantment.

Fear (This creature can't be blocked except by artifact creatures and/or black creatures.) When Shriekmaw enters the battlefield, destroy target nonartifact, nonblack creature. Evoke {1}{B} (You may cast this spell for its evoke cost. If you do, it's sacrificed when it enters the battlefield.)

Exile target creature. Its controller gains life equal to its power.

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.