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.

Whenever a creature enters the battlefield under your control, you gain 1 life.

+1: Draw a card, then put a card from your hand on top of your library.

-1: Exile another target permanent you own, then return it to the battlefield under your control.

-6: Choose left or right. Each player gains control of all nonland permanents other than Aminatou, the Fateshifter controlled by the next player in the chosen direction.

Aminatou, the Fateshifter can be your commander.

Flying

When Angel of Despair enters the battlefield, destroy target permanent.

Whenever a creature enters the battlefield under your control, you gain life equal to its toughness.

Arcane Sanctum enters the battlefield tapped.

{T}: Add {W}, {U}, or {B}.

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

Flying

When Ashen Rider enters the battlefield or dies, exile target permanent.

Flying

When Azor, the Lawbringer enters the battlefield, each opponent can't cast instant or sorcery spells during that player's next turn.

Whenever Azor attacks, you may pay {X}{W}{U}{U}. If you do, you gain X life and draw X cards.

Flying, deathtouch

When Baleful Strix enters the battlefield, draw a card.

When Basilica Bell-Haunt enters the battlefield, each opponent discards a card and you gain 3 life.

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

Whenever a nontoken creature enters the battlefield under your control, create a 2/2 white Unicorn creature token.

Flying

Haunt (When this creature dies, exile it haunting target creature.)

When Blind Hunter enters the battlefield or the creature it haunts dies, target player loses 2 life and you gain 2 life.

Flying

Whenever Brago, King Eternal deals combat damage to a player, exile any number of target nonland permanents you control, then return those cards to the battlefield under their owner's control.

When Callous Bloodmage enters the battlefield, choose one --

• Create a 1/1 black and green Pest creature token with "When this creature dies, you gain 1 life."

• You draw a card and you lose 1 life.

• Exile target player's graveyard.

Vigilance

When Cavalier of Dawn enters the battlefield, destroy up to one target nonland permanent. Its controller creates a 3/3 colorless Golem artifact creature token.

When Cavalier of Dawn dies, return target artifact or enchantment card from your graveyard to your hand.

Flying

When Cavalier of Gales enters the battlefield, draw three cards, then put two cards from your hand on top of your library in any order.

When Cavalier of Gales dies, shuffle it into its owner's library, then scry 2.

When Charming Prince enters the battlefield, choose one --

• Scry 2.

• You gain 3 life.

• Exile another target creature you own. Return it to the battlefield under your control at the beginning of the next end step.

Flying

When Cloudblazer enters the battlefield, you gain 2 life and draw two cards.

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

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

Sacrifice Commander's Sphere: Draw a card.

At the beginning of your end step, you may exile target creature you control, then return that card to the battlefield under your control.

Whenever another creature enters the battlefield under your control, each opponent loses 1 life.

When Dinrova Horror enters the battlefield, return target permanent to its owner's hand, then that player discards a card.

Whenever a blue creature enters the battlefield under your control, you may have target player draw a card.

Whenever a black creature enters the battlefield under your control, you may have target player discard a card.

Dismal Backwater enters the battlefield tapped.

When Dismal Backwater enters the battlefield, you gain 1 life.

{T}: Add {U} or {B}.

{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.

Exile any number of target creatures you control. Return those cards to the battlefield under their owner's control at the beginning of the next end step.

Flying

When Elite Guardmage enters the battlefield, you gain 3 life and draw a card.

{T}: Add {C}.

{1}, {T}, Sacrifice Esper Panorama: Search your library for a basic Plains, Island, or Swamp card, put it onto the battlefield tapped, then shuffle.

Flying

Whenever Ethereal Valkyrie enters the battlefield or attacks, draw a card, then exile a card from your hand face down. It becomes foretold. Its foretell cost is its mana cost reduced by {2}. (On a later turn, you may cast it for its foretell cost, even if this creature has left the battlefield.)

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

{T}: Add {C}.

{T}: Choose target commander that entered the battlefield this turn. Put a +1/+1 counter on it if it's a creature and a loyalty counter on it if it's a planeswalker.

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

Flying

When Grasping Thrull enters the battlefield, it deals 2 damage to each opponent and you gain 2 life.

Vigilance

When Lumbering Battlement enters the battlefield, exile any number of other nontoken creatures you control until it leaves the battlefield.

Lumbering Battlement gets +2/+2 for each card exiled with it.

When Mana Geode enters the battlefield, scry 1.

{T}: Add one mana of any color.

Choose one --

• Exile all artifacts.

• Exile all creatures.

• Exile all enchantments.

• Exile all planeswalkers.

When Meteor Golem enters the battlefield, destroy target nonland permanent an opponent controls.

When Mycosynth Wellspring enters the battlefield or is put into a graveyard from the battlefield, you may search your library for a basic land card, reveal it, put it into your hand, then shuffle.

Myriad Landscape enters the battlefield tapped.

{T}: Add {C}.

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

When Oath of Teferi enters the battlefield, exile another target permanent you control. Return it to the battlefield under its owner's control at the beginning of the next end step.

You may activate the loyalty abilities of planeswalkers you control twice each turn rather than only once.

{T}: Add {W}, {U}, or {B}.

When Obzedat, Ghost Council enters the battlefield, target opponent loses 2 life and you gain 2 life.

At the beginning of your end step, you may exile Obzedat. If you do, return it to the battlefield under its owner's control at the beginning of your next upkeep. It gains haste.

Whenever another creature enters the battlefield under your control, target creature an opponent controls gets -1/-1 until end of turn.

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

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

Flying

When Psychic Symbiont enters the battlefield, target opponent discards a card and you draw a card.

When Reflector Mage enters the battlefield, 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 Scholarship Sponsor enters the battlefield, each player who controls fewer lands than the player who controls the most lands searches their library for a number of basic land cards less than or equal to the difference, puts those cards onto the battlefield tapped, then shuffles.

Scoured Barrens enters the battlefield tapped.

When Scoured Barrens enters the battlefield, you gain 1 life.

{T}: Add {W} or {B}.

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 the battlefield 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.

Choose one or both --

• Exile target creature you don't control.

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

{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.

Whenever a creature is exiled from the battlefield, put a +1/+1 counter on Soulherder.

At the beginning of your end step, you may exile another target creature you control, then return that card to the battlefield under its owner's control.

When Spine of Ish Sah enters the battlefield, destroy target permanent.

When Spine of Ish Sah is put into a graveyard from the battlefield, return Spine of Ish Sah to its owner's hand.

This spell can't be countered.

Destroy all creatures.

Whenever another creature enters the battlefield under your control, you may gain 1 life.

Whenever a creature enters the battlefield under an opponent's control, you may have that player lose 1 life.

Until your next turn, your life total can't change and you gain protection from everything. All permanents you control phase out. (While they're phased out, they're treated as though they don't exist. They phase in before you untap during your untap step.)

Exile Teferi's Protection.

Temple of Deceit enters the battlefield tapped.

When Temple of Deceit enters the battlefield, scry 1.

{T}: Add {U} or {B}.

Temple of Enlightenment enters the battlefield tapped.

When Temple of Enlightenment enters the battlefield, scry 1.

{T}: Add {W} or {U}.

Temple of Silence enters the battlefield tapped.

When Temple of Silence enters the battlefield, scry 1.

{T}: Add {W} or {B}.

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

Indestructible

As long as your devotion to blue is less than five, Thassa isn't a creature.

At the beginning of your end step, exile up to one other target creature you control, then return that card to the battlefield under your control.

{3}{U}: Tap another target creature.

Return a creature you control to its owner's hand, then destroy all creatures.

Tranquil Cove enters the battlefield tapped.

When Tranquil Cove enters the battlefield, you gain 1 life.

{T}: Add {W} or {U}.

+2: Exile target permanent you own. Return it to the battlefield under your control at the beginning of the next end step.

-1: Creatures can't be blocked this turn.

-8: You get an emblem with "Whenever you cast a spell, exile target permanent."

{2}, {T}, Sacrifice Wayfarer's Bauble: Search your library for a basic land card, put that card onto the battlefield tapped, then shuffle.

Destroy all creatures. They can't be regenerated.

Companion -- Your starting deck contains at least twenty cards more than the minimum deck size. (If this card is your chosen companion, you may put it into your hand from outside the game for {3} as a sorcery.)

Flying

When Yorion enters the battlefield, exile any number of other nonland permanents you own and control. Return those cards to the battlefield at the beginning of the next end step.