Exile each creature you control. Return those cards to the battlefield under their owner's control at the beginning of the next end step.

Exile all nontoken creatures you control, then roll a d20. 1—9 | Return those cards to the battlefield under their owner's control at the beginning of the next end step. 10—20 | Return those cards to the battlefield under their owner's control, then exile them again. Return those cards to the battlefield under their owner's control at the beginning of the next end step.

When Niko enters, create two Shard tokens. (They're enchantments with "{2}, Sacrifice this token: Scry 1, then draw a card.") {2}, {T}: Exile target nonlegendary creature you control. Shards you control become copies of it until the next end step. Return it to the battlefield under its owner's control at the beginning of the next end step.

Whenever another nontoken creature you control enters, if it wasn't cast, create a token that's a copy of that creature, except it's a 0/1 white Illusion. {1}{W}, Sacrifice five Illusions: Exile target nonland permanent.

Exile any number of target creatures and/or planeswalkers you control. At the beginning of the next end step, return each of them to the battlefield under its owner's control. Each of them enters with an additional +1/+1 counter on it if it's a creature and an additional loyalty counter on it if it's a planeswalker.

Flash Flying When this creature enters, counter target spell. Put X +1/+1 counters on this creature, where X is that spell's mana value.

Flash When Ertai Resurrected enters, choose up to one — • Counter target spell, activated ability, or triggered ability. Its controller draws a card. • Destroy another target creature or planeswalker. Its controller draws a card.

Flash When this creature enters, you may counter target spell.

Flash When this creature enters, counter target spell.

Flash (You may cast this spell any time you could cast an instant.) Flying Exploit (When this creature enters, you may sacrifice a creature.) When this creature exploits a creature, counter target creature spell.

Flash Flying When this creature enters, exile target spell an opponent controls. Whenever this creature attacks, if a card is exiled with it, you may cast the exiled card without paying its mana cost.

Flash When this creature enters, counter up to one target activated or triggered ability. If an ability of an artifact, creature, or planeswalker is countered this way, that permanent loses all abilities for as long as this creature remains on the battlefield. (Mana abilities can't be targeted.)

Vigilance If a permanent entering causes a triggered ability of a permanent you control to trigger, that ability triggers an additional time. Permanents entering don't cause abilities of permanents your opponents control to trigger.

If a Wizard you control entering causes a triggered ability of a permanent you control to trigger, that ability triggers an additional time.

If an artifact or creature entering causes a triggered ability of a permanent you control to trigger, that ability triggers an additional time.

When this creature enters, choose one — • Create a 1/1 white Bird creature token with flying. • Return another target nonland permanent to its owner's hand. • Draw a card.

Tap an untapped Wizard you control: Draw a card.

Flying When this creature enters, draw a card.

Whenever one or more other creatures you control leave the battlefield without dying, draw a card. {1}{U}, {T}: Return another target creature you control to its owner's hand.

Reach When this creature enters, tap up to one target creature and put three stun counters on it. If you control that creature, draw two cards.

Flying When this creature enters, you gain 3 life and draw a card.

When this creature enters, draw a card.

Exile target creature you control, then return that card to the battlefield under your control.

Devoid (This card has no color.) {2}{C}: Exile another target creature, then return it to the battlefield tapped under its owner's control. ({C} represents colorless mana.)

{3}: Exile another target creature you control, then return it to the battlefield under its owner's control. Whenever another creature you control enters, you may pay {G/W}. If you do, put a +1/+1 counter on it. If it's a Unicorn, put two +1/+1 counters on it instead. ({G/W} can be paid with either {G} or {W}.)

Exile target creature you control, then return it to the battlefield under its owner's control. Rebound (If you cast this spell from your hand, exile it as it resolves. At the beginning of your next upkeep, you may cast this card from exile without paying its mana cost.)

Exile target creature or enchantment, then return it to the battlefield under its owner's control.

{2}, {T}: Exile another target creature you control. You may return that card to the battlefield under its owner's control. If you don't, at the beginning of the next end step, return that card to the battlefield under its owner's control with a vigilance counter and a lifelink counter on it.

Exile target creature you control, then return that card to the battlefield under its owner's control. It gains first strike until end of turn.

Flash Flying When this creature enters, you may exile target non-Angel creature you control, then return that card to the battlefield under your control.

This land enters tapped. {T}: Add {W}, {U}, or {B}.

This land enters tapped unless you have two or more opponents. {T}: Add {G} or {W}.

({T}: Add {G} or {U}.) As this land enters, you may pay 2 life. If you don't, it enters tapped.

Whenever this land becomes tapped, it deals 1 damage to you. {T}: Add one mana of any color.

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

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

{T}, Pay 1 life, Sacrifice this land: Search your library for a Plains or Island card, put it onto the battlefield, then shuffle.

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

If this card is in your opening hand and you're not the starting player, you may begin the game with Gemstone Caverns on the battlefield with a luck counter on it. If you do, exile a card from your hand. {T}: Add {C}. If Gemstone Caverns has a luck counter on it, instead add one mana of any color.

({T}: Add {W} or {B}.) As this land enters, you may pay 2 life. If you don't, it enters tapped.

({T}: Add {W} or {U}.) As this land enters, you may pay 2 life. If you don't, it enters tapped.

({T}: Add {G} or {U}.) This land enters tapped. When this land enters, surveil 1. (Look at the top card of your library. You may put it into your graveyard.)

({T}: Add {W}, {B}, or {G}.) This land enters tapped. Cycling {3} ({3}, Discard this card: Draw a card.)

({T}: Add {G} or {W}.) This land enters tapped. When this land enters, surveil 1. (Look at the top card of your library. You may put it into your graveyard.)

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

{T}, Pay 1 life, Sacrifice this land: Search your library for a Plains or Swamp card, put it onto the battlefield, then shuffle.

({T}: Add {W} or {U}.) This land enters tapped. When this land enters, surveil 1. (Look at the top card of your library. You may put it into your graveyard.)

{T}, Pay 1 life, Sacrifice this land: Search your library for a Forest or Island card, put it onto the battlefield, then shuffle.

This land enters tapped unless you have two or more opponents. {T}: Add {U} or {B}.

This land enters tapped. {T}: Add {B}, {G}, or {U}.

({T}: Add {B} or {G}.) As this land enters, you may pay 2 life. If you don't, it enters tapped.

{T}, Pay 1 life, Sacrifice this land: Search your library for an Island or Swamp card, put it onto the battlefield, then shuffle.

({T}: Add {W}, {U}, or {B}.) This land enters tapped. Cycling {3} ({3}, Discard this card: Draw a card.)

This land enters tapped unless you have two or more opponents. {T}: Add {G} or {U}.

This land enters tapped. {T}: Add {W}, {B}, or {G}.

This land enters tapped unless you have two or more opponents. {T}: Add {W} or {U}.

This land enters tapped. {T}: Add {G}, {W}, or {U}.

({T}: Add {W} or {B}.) This land enters tapped. When this land enters, surveil 1. (Look at the top card of your library. You may put it into your graveyard.)

({T}: Add {G}, {W}, or {U}.) This land enters tapped. Cycling {3} ({3}, Discard this card: Draw a card.)

({T}: Add {G} or {W}.) As this land enters, you may pay 2 life. If you don't, it enters tapped.

({T}: Add {U} or {B}.) This land enters tapped. When this land enters, surveil 1. (Look at the top card of your library. You may put it into your graveyard.)

({T}: Add {B} or {G}.) This land enters tapped. When this land enters, surveil 1. (Look at the top card of your library. You may put it into your graveyard.)

This land enters tapped unless you have two or more opponents. {T}: Add {B} or {G}.

Each land is a Swamp in addition to its other land types.

This land enters tapped unless you have two or more opponents. {T}: Add {W} or {B}.

{T}, Pay 1 life, Sacrifice this land: Search your library for a Swamp or Forest card, put it onto the battlefield, then shuffle.

({T}: Add {U} or {B}.) As this land enters, you may pay 2 life. If you don't, it enters tapped.

{T}, Pay 1 life, Sacrifice this land: Search your library for a Forest or Plains card, put it onto the battlefield, then shuffle.

Each land is a Forest in addition to its other land types.

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.) Any number of target nonland permanents you control phase out. (Treat them and anything attached to them as though they don't exist until your next turn.)

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

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

{T}: For each color among permanents you control, add one mana of that color.

When this creature enters, reveal the top card of your library. If it's a land card, put it onto the battlefield. Otherwise, put that card into your hand.

Vigilance This creature gets +1/+1 for each color among permanents you control. {T}: For each color among permanents you control, add one mana of that color.

Search your library for a Forest card, put that card onto the battlefield, then shuffle.

This creature has hexproof as long as it's untapped. (It can't be the target of spells or abilities your opponents control.) {T}: Add one mana of any color.

Search your library for a Forest card, put it onto the battlefield, then shuffle.

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

When this creature enters, exile target nonland permanent an opponent controls and all other nonland permanents that player controls with the same name as that permanent until this creature leaves the battlefield.

Flash Lifelink When this creature enters, it connives. When it connives this way, return up to one target spell to its owner's hand. (To have a creature connive, draw a card, then discard a card. If you discarded a nonland card, put a +1/+1 counter on that creature.)

Tap an untapped Wizard you control: Counter target spell unless its controller pays {1}.

When this creature enters, return target creature an opponent controls to its owner's hand. That creature's owner can't cast spells with the same name as that creature until your next turn.

When this creature enters, you may search your library for a creature card with toughness 2 or less, reveal it, put it into your hand, then shuffle.

When this creature enters, you may search your library for an instant or sorcery card with mana value 2 or less, reveal it, put it into your hand, then shuffle.

Prototype {1}{U}{U} — 2/1 (You may cast this spell with different mana cost, color, and size. It keeps its abilities and types.) When this creature enters, if you cast it, exile target instant or sorcery card with mana value less than or equal to this creature's power from your graveyard. Copy that card. You may cast the copy without paying its mana cost.

When this creature enters, look at the top three cards of target player's library, then put them back in any order. Cycling {U/B} ({U/B}, Discard this card: Draw a card.)

Flying When this creature enters, return target land to its owner's hand.

When Barrin enters, return up to one other target creature or planeswalker to its owner's hand. At the beginning of your end step, if a permanent was put into your hand from the battlefield this turn, draw a card.