{U}, Sacrifice Aether Spellbomb: Return target creature to its owner's hand. {1}, Sacrifice Aether Spellbomb: Draw a card.

{1}, {T}: You gain 2 life. {2}, {T}, Exile Campfire: Put all commanders you own from the command zone and from your graveyard into your hand. Then shuffle your graveyard into your library.

{3}, {T} or {U}, {T}: Return target creature to its owner's hand unless its controller pays {1}.

When Dream Stalker enters the battlefield, return a permanent you control to its owner's hand.

Whenever you cast a creature spell, you may pay {1}. If you do, return target creature to its owner's hand.

{1}, {T}: Return target creature you control and each Aura attached to it to their owners' hands. Activate only during your turn.

Sacrifice Seal of Removal: Return target creature to its owner's hand.

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

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

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.)

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

Play with the top card of your library revealed. You may play lands and cast spells from the top of your library.

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

At the beginning of each player's draw step, that player draws an additional card.

Draw X cards, where X is the number of card types among cards in your graveyard.

At the beginning of your upkeep, put a lore counter on Mind Unbound, then draw a card for each lore counter on Mind Unbound.

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.)

Look at the top three cards of your library, then put them back in any order. You may shuffle. Draw a card.

Scry 2, then draw a card. (To 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.)

Whenever a permanent deals damage to you, return it to its owner's hand.

Dream Prowler can't be blocked as long as it's attacking alone.

Whenever an opponent attacks, if they attacked you and/or a planeswalker you control, draw a card.

Defender, flying Prevent all combat damage that would be dealt to and dealt by Fog Bank.

Defender, flying Prevent all combat damage that would be dealt to Guard Gomazoa.

Permanents enter the battlefield tapped.

You have hexproof. (You can't be the target of spells or abilities your opponents control.) If a creature would deal damage to you, prevent 1 of that damage.

Creatures can't attack you unless their controller pays {2} for each creature they control that's attacking you.

Tap all creatures target player controls. Those creatures don't untap during that player's next untap step.

Defender, flying (This creature can't attack, and it can block creatures with flying.)

You may have Wall of Stolen Identity enter the battlefield as a copy of any creature on the battlefield, except it's a Wall in addition to its other types and has defender. When you do, tap the copied creature and it doesn't untap during its controller's untap step for as long as you control Wall of Stolen Identity.

Defender (This creature can't attack.) Whenever Wall of Tears blocks a creature, return that creature to its owner's hand at end of combat.

Each creature your opponents control is an Illusion in addition to its other types and has "When this creature becomes the target of a spell or ability, sacrifice it."

Players play with the top card of their libraries revealed.

Enchant creature, land, or planeswalker Enchanted permanent is a colorless land with "{T}: Add {C}" and loses all other card types and abilities.

As Cavern of Souls enters the battlefield, choose a creature type. {T}: Add {C}. {T}: Add one mana of any color. Spend this mana only to cast a creature spell of the chosen type, and that spell can't be countered.

{T}: Add {C}. {T}, Sacrifice Command Beacon: Put your commander into your hand from the command zone.

({T}: Add {U}.)

{T}: Add {C}. {4}, {T}: Proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

{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.)

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

{T}: Add {C}. {2}, {T}: Return target commander you own from the battlefield to your hand. Activate only during your turn.

At the beginning of your upkeep, put a time counter on As Foretold. Once each turn, you may pay {0} rather than pay the mana cost for a spell you cast with mana value X or less, where X is the number of time counters on As Foretold.

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

Flying As an additional cost to cast blue permanent spells, you may pay 2 life. Those spells cost {U} less to cast if you paid life this way. This effect reduces only the amount of blue mana you pay. Whenever you cast a blue permanent spell, draw a card.

Rather than pay the mana cost for a spell, its controller may discard a card that shares a color with that spell.

{T}: Add {C}{C}{C}. {3}, {T}, Sacrifice Dreamstone Hedron: Draw three cards.

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

Until end of turn, whenever a player taps an Island for mana, that player adds an additional {U}.

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

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.) Choose a counter on target permanent or suspended card. Remove that counter from that permanent or card or put another of those counters on it.

When Contagion Clasp enters the battlefield, put a -1/-1 counter on target creature. {4}, {T}: Proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

When Contagion Engine enters the battlefield, put a -1/-1 counter on each creature target player controls. {4}, {T}: Proliferate, then proliferate again. (Choose any number of permanents and/or players, then give each another counter of each kind already there. Then do it again.)

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

({U/P} can be paid with either {U} or 2 life.) Draw two cards, then proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

When Deepglow Skate enters the battlefield, double the number of each kind of counter on any number of target permanents.

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.

At the beginning of each player's upkeep, that player mills X cards, where X is the number of cards in their hand.

Whenever an opponent casts a spell, that player draws seven cards.

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

You may have Copy Enchantment enter the battlefield as a copy of any enchantment on the battlefield.

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.

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

Players skip their untap steps. At the beginning of your upkeep, sacrifice Stasis unless you pay {U}.

Equipped creature has hexproof and haste. (It can't be the target of spells or abilities your opponents control.) Equip {1}

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

When Agent of Treachery enters the battlefield, gain control of target permanent. At the beginning of your end step, if you control three or more permanents you don't own, draw three cards.

Flash At the beginning of each player's draw step, that player draws an additional card.

{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.

At the beginning of your upkeep, create a token that's a copy of another target nonland permanent you control.

Players have no maximum hand size. {X}{X}, {T}: Each player draws X cards. {2}{U}, {T}: Each opponent mills cards equal to the number of cards in their hand.

Defender (This creature can't attack.)

Defender, flying

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

Defender

You may look at the top card of your library any time. You may play lands and cast spells from the top of your library. Once during each of your turns, you may cast a spell from your hand or the top of your library without paying its mana cost.

Enchant creature (Target a creature as you cast this. This card enters the battlefield attached to that creature.) You control enchanted creature.

Whenever you cast a noncreature spell, you may pay {1}. If you do, tap target creature an opponent controls and it doesn't untap during its controller's next untap step.

Flash Defender

When Scourge of Fleets enters the battlefield, return each creature your opponents control with toughness X or less to its owner's hand, where X is the number of Islands you control.

When a player casts a spell, sacrifice Standstill. If you do, each of that player's opponents draws three cards.

Prevent all combat damage that would be dealt to and dealt by creatures you control.

As Swirl the Mists enters the battlefield, choose a color word. All instances of color words in the text of spells and permanents are changed to the chosen color word.

Split second (As long as this spell is on the stack, players can't cast spells or activate abilities that aren't mana abilities.) Enchant permanent You control enchanted permanent.

Whenever a creature or land becomes tapped, put an hourglass counter on it. Each permanent with an hourglass counter on it doesn't untap during its controller's untap step. At the beginning of each player's upkeep, remove all hourglass counters from permanents that player controls.

Defender Whenever Wall of Frost blocks a creature, that creature doesn't untap during its controller's next untap step.

Defender

Defender (This creature can't attack.) When Wall of Runes enters the battlefield, scry 1. (Look at the top card of your library. You may put that card on the bottom of your library.)