As Caged Sun enters the battlefield, choose a color. Creatures you control of the chosen color get +1/+1. Whenever a land's ability causes you to add one or more mana of the chosen color, add one additional mana of that color.

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

As Heraldic Banner enters the battlefield, choose a color. Creatures you control of the chosen color get +1/+0. {T}: Add one mana of the chosen color.

At the beginning of your upkeep, you gain X life, where X is the number of cards in your hand minus 4.

Whenever a player casts a blue spell, you may gain 1 life.

{T}: Add {C}. {1}, {T}, Sacrifice Mind Stone: Draw a card.

Flying Whenever an opponent draws a card, you may draw two cards.

When Dramatist's Puppet enters the battlefield, for each kind of counter on target permanent, put another counter of that kind on it or remove one from it.

Prototype {2}{U}{U} — 3/3 (You may cast this spell with different mana cost, color, and size. It keeps its abilities and types.) You may have Hulking Metamorph enter the battlefield as a copy of an artifact or creature you control, except it's an artifact creature in addition to its other types, and its power and toughness are equal to Hulking Metamorph's power and toughness.

Flash This spell can't be countered. Whenever you cast a spell, choose up to one — • Return target spell you don't control to its owner's hand. • Return target nonland permanent to its owner's hand.

Flash At the beginning of your end step, draw seven cards. Each opponent's maximum hand size is reduced by seven.

Whenever you cast an artifact, instant, or sorcery spell, copy that spell. You may choose new targets for the copy. This ability triggers only once each turn. (A copy of a permanent spell becomes a token.) Whenever an opponent casts an artifact, instant, or sorcery spell, counter that spell. This ability triggers only once each turn.

When Meldweb Curator enters the battlefield, put up to one target instant or sorcery card from your graveyard on top of your library.

Delve (Each card you exile from your graveyard while casting this spell pays for {1}.) Flying Murktide Regent enters the battlefield with a +1/+1 counter on it for each instant and sorcery card exiled with it. Whenever an instant or sorcery card leaves your graveyard, put a +1/+1 counter on Murktide Regent.

Whenever you cast an instant or sorcery spell, create a 1/1 blue Bird Illusion creature token with flying.

{T}: Add {C}{U}. Spend this mana only to activate abilities.

Reach {2}, {T}: Put target card from a graveyard on the bottom of its owner's library.

As Phyrexian Revoker enters the battlefield, choose a nonland card name. Activated abilities of sources with the chosen name can't be activated.

Psychosis Crawler's power and toughness are each equal to the number of cards in your hand. Whenever you draw a card, each opponent loses 1 life.

Defender When Reito Sentinel enters the battlefield, target player mills three cards. (They put the top three cards of their library into their graveyard.) {3}: Put target card from a graveyard on the bottom of its owner's library.

Landfall — Whenever a land enters the battlefield under your control, each opponent mills three cards. (To mill a card, a player puts the top card of their library into their graveyard.)

Whenever Terisian Mindbreaker attacks, defending player mills half their library, rounded up. Unearth {1}{U}{U}{U} ({1}{U}{U}{U}: Return this card from your graveyard to the battlefield. It gains haste. Exile it at the beginning of the next end step or if it would leave the battlefield. Unearth only as a sorcery.)

Flying Whenever Thrummingbird 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.)

Flying Trawler Drake enters the battlefield with an oil counter on it. Trawler Drake gets +1/+1 for each oil counter on it. Whenever you cast a noncreature spell, put an oil counter on Trawler Drake.

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

If Leyline of Anticipation is in your opening hand, you may begin the game with it on the battlefield. You may cast spells as though they had flash.

Cumulative upkeep {1} (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.) Whenever an opponent casts a noncreature spell, you may draw a card unless that player pays {4}.

You may cast spells from your hand without paying their mana costs.

Counter target spell.

Counter target spell with mana value 4 or greater.

As an additional cost to cast this spell, tap an untapped artifact you control or pay {1}. Counter target spell.

This spell costs {U} less to cast if an opponent cast two or more spells this turn. Counter target spell.

Counter target creature spell. Draw a card.

Draw two cards, then discard two cards. Untap up to three lands.

Counter target noncreature spell.

Counter target artifact or creature spell unless its controller pays {4}.

Put a +1/+1 counter on target creature. It phases out. (Treat it and anything attached to it as though they don't exist until its controller's next turn.)

Return target creature to its owner's hand. Untap up to two lands.

Counter target spell. Fateful hour — If you have 5 or less life, draw a card.

Counter target creature or planeswalker spell. Create a Blood token. (It's an artifact with "{1}, {T}, Discard a card, Sacrifice this artifact: Draw a card.")

Counter target activated ability, triggered ability, or legendary spell.

Draw three cards. Then discard two cards unless you discard a basic land card.

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.) Draw X cards.

Choose artifact, creature, or land. Tap all untapped permanents of the chosen type target player controls, or untap all tapped permanents of that type that player controls.

Indestructible {T}: Add {C}.

({T}: Add {U}.)

+2: Each player draws a card. −1: Target player draws a card. −10: Target player mills twenty cards.

Return six target nonland permanents to their owners' hands.

Each player shuffles their hand and graveyard into their library, then draws seven cards. If it's your turn, end the turn. (Exile all spells and abilities from the stack, including this card. Discard down to your maximum hand size. Damage wears off, and "this turn" and "until end of turn" effects end.)

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.

Create a token that's a copy of target creature you control, except the token has flying and it isn't legendary.

Target opponent mills seven cards.

Return target instant or sorcery card from your graveyard to your hand.

You may cast Silver Scrutiny as though it had flash if X is 3 or less. Draw X cards.

Target player mills half their library, rounded down.