Arvinox, the Mind Flail isn't a creature unless you control three or more permanents you don't own.

At the beginning of your end step, exile the bottom card of each opponent's library face down. For as long as those cards remain exiled, you may look at them, you may cast permanent spells from among them, and you may spend mana as though it were mana of any color to cast those spells.

Whenever City of Brass becomes tapped, it deals 1 damage to you.

{T}: Add one mana of any color.

Whenever City of Brass becomes tapped, it deals 1 damage to you.

{T}: Add one mana of any color.

Whenever City of Brass becomes tapped, it deals 1 damage to you.

{T}: Add one mana of any color.

{T}: Add {U}.

{T}: Add {B}.

{T}: Add {U}.

{T}: Add {B}.

{T}: Add {U}.

{T}: Add {B}.

{T}: Add {U}.

{T}: Add {B}.

You may have Copy Artifact enter the battlefield as a copy of any artifact on the battlefield, except it's an enchantment in addition to its other types.

You may have Copy Artifact enter the battlefield as a copy of any artifact on the battlefield, except it's an enchantment in addition to its other types.

You may have Copy Artifact enter the battlefield as a copy of any artifact on the battlefield, except it's an enchantment in addition to its other types.

You may have Copy Artifact enter the battlefield as a copy of any artifact on the battlefield, except it's an enchantment in addition to its other types.

Counter target spell.

Counter target spell.

Counter target spell.

Add {B}{B}{B}.

Add {B}{B}{B}.

Add {B}{B}{B}.

Add {B}{B}{B}.

Choose a card name. Exile the top six cards of your library, then reveal cards from the top of your library until you reveal a card with the chosen name. Put that card into your hand and exile all other cards revealed this way.

Search your library for a card, put that card into your hand, then shuffle.

{T}: Add {C}.

{U}{B}, {T}: Target player mills a card.

You may pay 1 life and exile a blue card from your hand rather than pay this spell's mana cost.

Counter target spell.

You may pay 1 life and exile a blue card from your hand rather than pay this spell's mana cost.

Counter target spell.

{T}: Exile a card from your hand face down. You may look at it for as long as it remains exiled.

{T}: Return a card you own exiled with Gustha's Scepter to your hand.

When you lose control of Gustha's Scepter, put all cards exiled with Gustha's Scepter into their owner's graveyard.

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, if Howling Mine is untapped, that player draws an additional card.

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, if Howling Mine is untapped, that player draws an additional card.

({T}: Add {U}.)

({T}: Add {U}.)

+2: Each player draws a card.

-1: Target player draws a card.

-10: Target player mills twenty cards.

+1: Draw a card. Target player mills a card.

0: Target player mills ten cards.

-7: Any number of target players each draw twenty cards.

If Lotus Vale would enter the battlefield, sacrifice two untapped lands instead. If you do, put Lotus Vale onto the battlefield. If you don't, put it into its owner's graveyard.

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

{T}, Sacrifice Mirror Universe: Exchange life totals with target opponent. Activate only during your upkeep.

If Mox Diamond would enter the battlefield, you may discard a land card instead. If you do, put Mox Diamond onto the battlefield. If you don't, put it into its owner's graveyard.

{T}: Add one mana of any color.

If Mox Diamond would enter the battlefield, you may discard a land card instead. If you do, put Mox Diamond onto the battlefield. If you don't, put it into its owner's graveyard.

{T}: Add one mana of any color.

Search your library for an instant or sorcery card, reveal it, then shuffle and put that card on top.

+1: You draw a card and you lose 1 life.

-3: Destroy target creature.

-8: Target opponent gets an emblem with "Whenever a player draws a card, you lose 2 life."

Whenever an opponent draws a card, Ob Nixilis, the Hate-Twisted deals 1 damage to that player.

-2: Destroy target creature. Its controller draws two cards.

Target player draws cards equal to half the number of cards in their library and loses half their life. Round up each time.

Target player draws cards equal to half the number of cards in their library and loses half their life. Round up each time.

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

Counter target activated or triggered ability. (Mana abilities can't be targeted.)

Counter target activated or triggered ability. (Mana abilities can't be targeted.)

{T}: Add {C}.

{T}, Sacrifice Strip Mine: Destroy target land.

({T}: Add {B}.)

({T}: Add {B}.)

At the beginning of each player's draw step, that player puts the cards in their hand on the bottom of their library in any order, then draws that many cards.

At the beginning of each player's draw step, that player puts the cards in their hand on the bottom of their library in any order, then draws that many cards.

At the beginning of each player's draw step, that player puts the cards in their hand on the bottom of their library in any order, then draws that many cards.

At the beginning of each player's upkeep, destroy target nonartifact creature that player controls of their choice. It can't be regenerated.

All creatures have "At the beginning of your upkeep, destroy this creature unless you pay {1}."

{T}: Add {C}.

{T}: Add {U} or {B}. Underground River deals 1 damage to you.

{T}: Add {C}.

{T}: Add {U} or {B}. Underground River deals 1 damage to you.

{T}: Add {C}.

{T}: Add {U} or {B}. Underground River deals 1 damage to you.

{T}: Add {C}.

{T}: Add {U} or {B}. Underground River deals 1 damage to you.

Whenever an opponent draws a card, Underworld Dreams deals 1 damage to that player.

Whenever an opponent draws a card, Underworld Dreams deals 1 damage to that player.

Whenever an opponent draws a card, Underworld Dreams deals 1 damage to that player.

Whenever an opponent draws a card, Underworld Dreams deals 1 damage to that player.

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

As Watery Grave enters the battlefield, you may pay 2 life. If you don't, it enters the battlefield tapped.

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

As Watery Grave enters the battlefield, you may pay 2 life. If you don't, it enters the battlefield tapped.