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.

Draw a card for each tapped creature target opponent controls.

{T}: Target player draws two cards, then discards two cards.

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

{U}, {T}: Each player reveals the top card of their library. You may put the revealed cards into their owners' graveyards. If you don't, each player draws a card.

Target player draws two cards. Flashback—{1}{U}, Pay 3 life. (You may cast this card from your graveyard for its flashback cost. Then exile it.)

You may return two Islands you control to their owner's hand rather than pay this spell's mana cost. Draw two cards.

At the beginning of each player's draw step, if Howling Mine is untapped, that player draws an additional card.

{1}, {T}: Tap target creature. This ability costs {1} less to activate during your turn. {3}, Sacrifice Hylda's Crown of Winter: Draw a card for each tapped creature your opponents control.

{U}, {T}: Each player discards their hand, then draws cards equal to the greatest number of cards a player discarded this way.

Draw a card for each attacking creature.

Draw a card for each tapped creature target opponent controls.

Delve (Each card you exile from your graveyard while casting this spell pays for {1}.) Draw three cards.

Whenever a creature an opponent controls becomes tapped, if it isn't being declared as an attacker, you may draw a card. {4}{U}: Tap target creature without flying.

You may choose not to untap Callous Oppressor during your untap step. As Callous Oppressor enters the battlefield, an opponent chooses a creature type. {T}: Gain control of target creature that isn't of the chosen type for as long as Callous Oppressor remains tapped.

Whenever Cephalid Constable deals combat damage to a player, return up to that many target permanents that player controls to their owner's hand.

Return all nonblue creatures to their owners' hands.

Changeling (This card is every creature type.) {2}{U}: Target Shapeshifter becomes a copy of target creature until your next turn.

As long as Storage Matrix is untapped, each player chooses artifact, creature, or land during their untap step. That player can untap only permanents of the chosen type this step.

{T}: Add {C}. {2}, {T}, Sacrifice Buried Ruin: Return target artifact card from your graveyard to your hand.

{T}: Add {U}. Cephalid Coliseum deals 1 damage to you. Threshold — {U}, {T}, Sacrifice Cephalid Coliseum: Target player draws three cards, then discards three cards. Activate only if seven or more cards are in your graveyard.

{T}: Add one mana of any color. Whenever you tap Forbidden Orchard for mana, target opponent creates a 1/1 colorless Spirit creature token.

{T}: Add {C}. {T}: Untap target Griffin. If it's a creature, it gets +1/+1 until end of turn.

({T}: Add {U}.)

{T}: Add {U}. {U}, {T}: Untap target legendary permanent.

{T}: Add {C}. {1}: Mutavault becomes a 2/2 creature with all creature types until end of turn. It's still a land.

({T}: Add {U}.) Mystic Sanctuary enters the battlefield tapped unless you control three or more other Islands. When Mystic Sanctuary enters the battlefield untapped, you may put target instant or sorcery card from your graveyard on top of your library.

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

Counter target noncreature spell. Its controller creates two Treasure tokens. (They're artifacts with "{T}, Sacrifice this artifact: Add one mana of any color.")

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.

Creatures you control have flying. Creatures your opponents control lose flying and can't have or gain flying.

Whenever Cephalid Illusionist becomes the target of a spell or ability, mill three cards. {2}{U}, {T}: Prevent all combat damage that would be dealt to and dealt by target creature you control this turn.

Counter target spell.

Counter target spell. If the spell is countered this way, exile it with three time counters on it instead of putting it into its owner's graveyard. If it doesn't have suspend, it gains suspend. (At the beginning of its owner's upkeep, they remove a time counter. When the last is removed, they may play it without paying its mana cost. If it's a creature, it has haste.)

You may discard an Island card and another card rather than pay this spell's mana cost. Counter target spell.

Whenever a nontoken creature enters the battlefield, if Genesis Chamber is untapped, that creature's controller creates a 1/1 colorless Myr artifact creature token.

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.

{2}{U}, {T}, Discard a card, Sacrifice a land: Search your library for up to two basic land cards, put them onto the battlefield, then shuffle.

Tap target untapped creature you control. If you do, add an amount of {C} equal to that creature's mana value.

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

As long as Mirran Safehouse is on the battlefield, it has all activated abilities of all land cards in all graveyards.

Blue spells you cast cost {1} less to cast.

Whenever Scaretiller becomes tapped, choose one — • You may put a land card from your hand onto the battlefield tapped. • Return target land card from your graveyard to the battlefield tapped.

Sky Diamond enters the battlefield tapped. {T}: Add {U}.

{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.

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

Look at the top X cards of your library. Put one of them into your hand and the rest on the bottom of your library in any order. Flashback—{1}{U}, Exile X blue cards from your graveyard. (You may cast this card from your graveyard for its flashback cost, then exile it. You can't exile Flash of Insight to pay for its own flashback cost.)

If you would draw a card while your library has no cards in it, you win the game instead.

As Living Lore enters the battlefield, exile an instant or sorcery card from your graveyard. Living Lore's power and toughness are each equal to the exiled card's mana value. Whenever Living Lore deals combat damage, you may sacrifice it. If you do, you may cast the exiled card without paying its mana cost.

Shuffle all cards from your graveyard into your library. Target player mills that many cards.

Flash When Snapcaster Mage enters the battlefield, target instant or sorcery card in your graveyard gains flashback until end of turn. The flashback cost is equal to its mana cost. (You may cast that card from your graveyard for its flashback cost. Then exile it.)

Delve (Each card you exile from your graveyard while casting this spell pays for {1}.) Take an extra turn after this one. Exile Temporal Trespass.

Target player mills half their library, rounded down.

As long as the top card of your graveyard is a creature card, Volrath's Shapeshifter has the full text of that card and has the text "{2}: Discard a card." (Volrath's Shapeshifter has that card's name, mana cost, color, types, abilities, power, and toughness.) {2}: Discard a card.

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

Whenever Cephalid Aristocrat becomes the target of a spell or ability, mill two cards.

Cephalid Facetaker can't be blocked. At the beginning of combat on your turn, you may have Cephalid Facetaker become a copy of another target creature until end of turn, except it's 1/4 and has "This creature can't be blocked."

At the beginning of your upkeep, you may have Cryptoplasm become a copy of another target creature, except it has this ability.

Look at the top four cards of your library. Put one of them into your hand and the rest on the bottom of your library in any order.

Target player mills X cards. If this spell was cast from a graveyard, that player mills twice that many cards instead. Flashback {X}{U} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Create a token that's a copy of target creature you control. Jump-start (You may cast this card from your graveyard by discarding a card in addition to paying its other costs. Then exile this card.)

Counter target spell. Untap up to four lands.

When Scrivener enters the battlefield, you may return target instant card from your graveyard to your hand.

At the beginning of each opponent's upkeep, that player reveals the top card of their library. If it's a creature card, the player puts the card into their graveyard and Shapeshifter's Marrow becomes a copy of that card. (If it does, it loses this ability.)