Whenever you cast a spell with {X} in its mana cost, put two charge counters on this artifact. {T}: Add one mana of any color. {T}: Add {C} for each charge counter on this artifact. Spend this mana only on costs that contain {X}.

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

You have no maximum hand size. {T}: Add one mana of any color.

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

Flash At the beginning of your upkeep, put an oil counter on this artifact. Instant and sorcery spells you cast cost {1} less to cast for each oil counter on this artifact.

{T}: Add {R}. When that mana is spent to cast a red instant or sorcery spell, copy that spell and you may choose new targets for the copy.

Council's dilemma — Starting with you, each player votes for time or money. For each time vote, take an extra turn after this one. For each money vote, choose a permanent owned by the voter and gain control of it. Exile Expropriate.

Choose target instant or sorcery spell that targets only a single permanent or player. Copy that spell for each other permanent or player the spell could target. Each copy targets a different one of those permanents and players.

Counter target spell unless its controller pays {X}.

Multikicker {1} (You may pay an additional {1} any number of times as you cast this spell.) Choose any target, then choose another target for each time this spell was kicked. Comet Storm deals X damage to each of them.

Counter target spell unless its controller pays {X}. Scry 2. (Look at the top two cards of your library, then put any number of them on the bottom and the rest on top in any order.)

Electrodominance deals X damage to any target. You may cast a spell with mana value X or less from your hand without paying its mana cost.

Look at the top three cards of your library. Put one of them into your hand and the rest on the bottom of your library in any order. Proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

Surge {X}{R} (You may cast this spell for its surge cost if you or a teammate has cast another spell this turn.) Fall of the Titans deals X damage to each of up to two targets.

Counter target spell unless its controller pays {X}. Mindswipe deals X damage to that spell's controller.

Counter target spell unless its controller pays {X}. If that player doesn't, they tap all lands with mana abilities they control and lose all unspent mana.

Choose one — • Tap X target permanents. • Untap X target permanents.

Buyback {3} (You may pay an additional {3} as you cast this spell. If you do, put this card into your hand as it resolves.) Copy target instant or sorcery spell. You may choose new targets for the copy.

Counter target spell. Untap up to four lands.

Exile target permanent.

Buyback {3} (You may pay an additional {3} as you cast this spell. If you do, put this card into your hand as it resolves.) Counter target spell with mana value X.

When you next cast an instant or sorcery spell this turn, copy that spell X times. You may choose new targets for the copies.

Target player draws X cards.

Banefire deals X damage to any target. If X is 5 or more, this spell can't be countered and the damage can't be prevented.

This spell costs {1} less to cast for each creature on the battlefield. Blasphemous Act deals 13 damage to each creature.

Blaze deals X damage to any target.

For each land you control, create a Treasure token. (It's an artifact with "{T}, Sacrifice this token: Add one mana of any color.")

Burn from Within deals X damage to any target. If a creature is dealt damage this way, it loses indestructible until end of turn. If that creature would die this turn, exile it instead.

Proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.) Draw a card.

Crackle with Power deals five times X damage to each of up to X targets.

Exile X target creatures. For each creature exiled this way, its controller creates a 2/2 green Boar creature token.

Draw X cards. If X is 10 or more, instead shuffle your graveyard into your library, draw X cards, untap up to five lands, and you have no maximum hand size for the rest of the game. Exile Finale of Revelation.

This spell costs {1} more to cast for each target beyond the first. Fireball deals X damage divided evenly, rounded down, among any number of targets.

Choose one — • Draw X cards. • Invoke the Firemind deals X damage to any target.

(You may cast a legendary sorcery only if you control a legendary creature or planeswalker.) Jaya's Immolating Inferno deals X damage to each of up to three targets.

Gain control of X target creatures and/or planeswalkers.

Draw X cards.

Kicker {5} (You may pay an additional {5} as you cast this spell.) Create a token that's a copy of target creature. If this spell was kicked, create five of those tokens instead.

When this creature enters, return target instant or sorcery card from your graveyard to your hand.

Instant and sorcery spells you cast cost {1} less to cast. Whenever you cast an instant or sorcery spell, draw a card.

At the beginning of your upkeep, return an instant or sorcery card at random from your graveyard to your hand. Whenever you cast an instant or sorcery spell, this creature gets +4/+0 until end of turn.

Whenever you cast a noncreature spell, proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

Whenever you cast an instant or sorcery spell from your hand, you may cast up to one target card of the other type from your graveyard. If a spell cast from your graveyard this way would be put into your graveyard, exile it instead. Choose a Background (You can have a Background as a second commander.)

Instant and sorcery spells you cast cost {1} less to cast.

Flying Instant and sorcery spells you cast cost {1} less to cast.

Flying Ward—{3}, Pay 3 life. Whenever you cast a noncreature spell, create X 1/1 red Phyrexian Goblin creature tokens, where X is the mana value of that spell. They gain haste until end of turn.

Flying Instant and sorcery spells you cast with mana value 5 or greater cost {1} less to cast.

Flying Whenever this creature deals combat damage to a player, proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

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

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

({T}: Add {U}.)

This land enters tapped. When this land enters, return a land you control to its owner's hand. {T}: Add {U}{R}.

This land enters tapped. {T}: Add {U} or {R}.

({T}: Add {R}.)

This land enters tapped. {T}: Add {C}. {2}, {T}, Sacrifice this land: Search your library for up to two basic land cards that share a land type, put them onto the battlefield tapped, then shuffle.

You have no maximum hand size. {T}: Add {C}.

Hideaway 4 (When this land enters, look at the top four cards of your library, exile one face down, then put the rest on the bottom in a random order.) This land enters tapped. {T}: Add {R}. {R}, {T}: You may play the exiled card without paying its mana cost if an opponent was dealt 7 or more damage this turn.

This land enters tapped. When this land enters, you gain 1 life. {T}: Add {U} or {R}.

This land enters tapped. When this land enters, scry 1. (Look at the top card of your library. You may put that card on the bottom.) {T}: Add {U} or {R}.

Whenever you cast an instant or sorcery spell, create an X/X colorless Construct artifact creature token, where X is that spell's mana value. {3}{U}{U}, Exile this enchantment: Return all instant and sorcery cards from your graveyard to your hand. Activate only if you control six or more artifacts.

If X is 1, scry 1, then draw a card. If X is 2, you may choose a player. They return a creature they control to its owner's hand. If X is 3, create a 4/4 blue and red Elemental creature token. If X is 4 or more, do all of the above.