Exile the top three cards of your library. Until end of turn, you may play cards exiled this way. (If you cast a spell this way, you still pay its costs. You can play a land this way only if you have an available land play remaining.)

Basalt Monolith doesn't untap during your untap step.

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

{3}: Untap Basalt Monolith.

At the beginning of each player's precombat main phase, if Blinkmoth Urn is untapped, that player adds {C} for each artifact they control.

As an additional cost to cast this spell, discard two cards.

Draw three cards.

Coldsteel Heart enters the battlefield tapped.

As Coldsteel Heart enters the battlefield, choose a color.

{T}: Add one mana of the chosen color.

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

Sacrifice Commander's Sphere: Draw a card.

{T}, Sacrifice Conjurer's Bauble: Put up to one target card from your graveyard on the bottom of your library. Draw a card.

{T}: Add {C}.

{T}, Sacrifice Crystal Vein: Add {C}{C}.

+2: Discard up to two cards, then draw that many cards.

-2: Sacrifice an artifact. If you do, return target artifact card from your graveyard to the battlefield.

-10: You get an emblem with "Whenever an artifact is put into your graveyard from the battlefield, return that card to the battlefield at the beginning of the next end step."

Daretti, Scrap Savant can be your commander.

Indestructible

{T}: Add one mana of any color.

Add {R}{R}{R}.

Splice onto Arcane {1}{R} (As you cast an Arcane spell, you may reveal this card from your hand and pay its splice cost. If you do, add this card's effects to that spell.)

{3}, {T}: Double the amount of each type of unspent mana you have.

{T}: Add {C}.

{3}: Return Drownyard Temple from your graveyard to the battlefield tapped.

Dwarven Ruins enters the battlefield tapped.

{T}: Add {R}.

{T}, Sacrifice Dwarven Ruins: Add {R}{R}.

Multikicker {2} (You may pay an additional {2} any number of times as you cast this spell.)

Everflowing Chalice enters the battlefield with a charge counter on it for each time it was kicked.

{T}: Add {C} for each charge counter on Everflowing Chalice.

Imprint -- When Extraplanar Lens enters the battlefield, you may exile target land you control.

Whenever a land with the same name as the exiled card is tapped for mana, its controller adds one mana of any type that land produced.

Draw two cards, then discard two cards.

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

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

Take an extra turn after this one. At the beginning of that turn's end step, you lose the game.

Fire Diamond enters the battlefield tapped.

{T}: Add {R}.

Forgotten Cave enters the battlefield tapped.

{T}: Add {R}.

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

Add {R}{R}{R}{R}{R}{R}{R}. Spend this mana only to cast artifact or creature spells.

{T}: Add three mana of any one color.

End the turn. (Exile all spells and abilities from the stack, including this card. The player whose turn it is discards down to their maximum hand size. Damage wears off, and "this turn" and "until end of turn" effects end.)

At the beginning of your next end step, you lose the game.

{T}: Choose target artifact a player controls and target artifact card in that player's graveyard. If both targets are still legal as this ability resolves, that player simultaneously sacrifices the artifact and returns the artifact card to the battlefield.

When Godo, Bandit Warlord enters the battlefield, you may search your library for an Equipment card, put it onto the battlefield, then shuffle.

Whenever Godo attacks for the first time each turn, untap it and all Samurai you control. After this phase, there is an additional combat phase.

{R}, Return Grinning Ignus to its owner's hand: Add {C}{C}{R}. Activate only as a sorcery.

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

{2}, {T}, Sacrifice Hedron Archive: Draw two cards.

{T}: Add {C}. ({C} represents colorless mana.)

Spells cost {1} less to cast.

At the beginning of combat on your turn, create a token that's a copy of equipped creature, except the token isn't legendary. That token gains haste.

Equip {5}

{T}: Add {C}.

Tap an untapped legendary permanent you control: Untap Honor-Worn Shaku.

{T}: Add {R}.

{1}, {T}: Put a charge counter on Jeweled Amulet. Note the type of mana spent to pay this activation cost. Activate only if there are no charge counters on Jeweled Amulet.

{T}, Remove a charge counter from Jeweled Amulet: Add one mana of Jeweled Amulet's last noted type.

{1}, {T}: Put a charge counter on Kyren Toy.

{T}, Remove X charge counters from Kyren Toy: Add an amount of {C} equal to X plus one.

Take an extra turn after this one. At the beginning of that turn's end step, you lose the game.

At the beginning of your upkeep, you may put a petal counter on Lotus Blossom.

{T}, Sacrifice Lotus Blossom: Add X mana of any one color, where X is the number of petal counters on Lotus Blossom.

{T}, Sacrifice Lotus Petal: Add one mana of any color.

Attach target Equipment to target creature. (Control of the Equipment doesn't change.)

Whenever a player taps a land for mana, that player adds one mana of any type that land produced.

Add {R} for each tapped land your opponents control.

Sacrifice any number of lands, then add that much {C}.

Mana Vault doesn't untap during your untap step.

At the beginning of your upkeep, you may pay {4}. If you do, untap Mana Vault.

At the beginning of your draw step, if Mana Vault is tapped, it deals 1 damage to you.

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

{T}: Add {C}.

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

As an additional cost to cast this spell, discard a card.

Draw two cards and create two Treasure tokens. (They're artifacts with "{T}, Sacrifice this artifact: Add one mana of any color.")

{T}: Add {C}.

{1}, {T}: Add one mana of any color.

Whenever an artifact enters the battlefield under your control, you may discard a card. If you do, draw a card.

Add {R}{R}, then add {R} for each card named Rite of Flame in each graveyard.

{T}, Discard a card: Draw a card.

Sandstone Needle enters the battlefield tapped with two depletion counters on it.

{T}, Remove a depletion counter from Sandstone Needle: Add {R}{R}. If there are no depletion counters on Sandstone Needle, sacrifice it.

{T}: Add {C}.

{2}, {T}: Scry 1. (Look at the top card of your library. You may put that card on the bottom of your library.)

Add {R}{R}{R}{R}{R}.

{1}: Look at the top three cards of your library, then put them back in any order.

{T}: Draw a card, then put Sensei's Divining Top on top of its owner's library.

{T}: Add {C}.

{4}, {T}, Sacrifice Sequestered Stash: Mill five cards. Then you may put an artifact card from your graveyard on top of your library.

{T}: Add {C}.

Any time you could mulligan and Serum Powder is in your hand, you may exile all the cards from your hand, then draw that many cards. (You can do this in addition to taking mulligans.)

Exile Simian Spirit Guide from your hand: Add {R}.

Smoldering Crater enters the battlefield tapped.

{T}: Add {R}.

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

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

{2}: Target creature gains trample until end of turn. If this is the third time this ability has resolved this turn, you may add {R}{R}{R}{R}{R}{R}{R}{R}.

Star Compass enters the battlefield tapped.

{T}: Add one mana of any color that a basic land you control could produce.

You have no maximum hand size.

{T}: Add {C}.

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

As an additional cost to cast this spell, discard a card.

Draw two cards.

{T}: Add {C}.

{1}, {T}: Target creature gains protection from artifacts until end of turn.

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

Pay 3 life: Add {R}.

Untaidake, the Cloud Keeper enters the battlefield tapped.

{T}, Pay 2 life: Add {C}{C}. Spend this mana only to cast legendary spells.

{1}{R}, Sacrifice Vessel of Volatility: Add {R}{R}{R}{R}.

{2}, {T}, Sacrifice Wayfarer's Bauble: Search your library for a basic land card, put that card onto the battlefield tapped, then shuffle.

As an additional cost to cast this spell, discard a card.

Draw two cards.

Worn Powerstone enters the battlefield tapped.

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