Players have no maximum hand size.

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

Flying

Your opponents can't gain life.

At the beginning of each end step, each opponent loses life equal to the life that player lost this turn. (Damage causes loss of life.)

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

When Black Cat dies, target opponent discards a card at random.

At the beginning of each player's upkeep, that player discards a card at random.

Target player draws X cards.

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

If a player would draw a card except the first one they draw in each of their draw steps, that player discards a card instead. If the player discards a card this way, they draw a card. If the player doesn't discard a card this way, they mill a card.

Whenever you cast a blue spell, exile the top card of target player's library.

Whenever you cast a black spell, exile the top card of target player's library.

Your opponents can't cast spells with the same name as a card exiled with Circu, Dimir Lobotomist.

Target opponent reveals their hand. You choose a card from it. That player discards that card.

Coral Atoll enters the battlefield tapped.

When Coral Atoll enters the battlefield, sacrifice it unless you return an untapped Island you control to its owner's hand.

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

As Cursed Rack enters the battlefield, choose an opponent.

The chosen player's maximum hand size is four.

Deathtouch

Skip your draw step.

At the beginning of your upkeep, if you have fewer than seven cards in hand, draw cards equal to the difference.

When Deadbridge Shaman dies, target opponent discards a card.

Raid -- When Deadeye Tormentor enters the battlefield, if you attacked this turn, target opponent discards a card.

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

Creatures with power greater than the number of cards in your hand can't attack.

Everglades enters the battlefield tapped.

When Everglades enters the battlefield, sacrifice it unless you return an untapped Swamp you control to its owner's hand.

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

Whenever an opponent loses life, you gain that much life.

Whenever an opponent draws a card, Fate Unraveler deals 1 damage to that player.

{T}, Exile Feldon's Cane: Shuffle your graveyard into your library.

Flying

When Fell Specter enters the battlefield, target opponent discards a card.

Whenever an opponent discards a card, that player loses 2 life.

({T}: Add {G}.)

({T}: Add {G}.)

({T}: Add {G}.)

({T}: Add {G}.)

({T}: Add {G}.)

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}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

At the beginning of your upkeep, you gain X life, where X is the number of cards in your hand minus 4.

+2: Each player draws a card.

-1: Target player draws a card.

-10: Target player mills twenty cards.

If Lake of the Dead would enter the battlefield, sacrifice a Swamp instead. If you do, put Lake of the Dead onto the battlefield. If you don't, put it into its owner's graveyard.

{T}: Add {B}.

{T}, Sacrifice a Swamp: Add {B}{B}{B}{B}.

({T}: Add {B}.)

Leechridden Swamp enters the battlefield tapped.

{B}, {T}: Each opponent loses 1 life. Activate only if you control two or more black permanents.

{T}: Add {C}.

{T}: Draw a card. Activate only if you have exactly seven cards in hand.

You have no maximum hand size.

If an effect causes you to discard a card, discard it, but you may put it on top of your library instead of into your graveyard.

+1: Target player loses 2 life.

-1: Return target creature card from your graveyard to your hand.

-7: Destroy up to two target creatures. Put up to two creature cards from graveyards onto the battlefield under your control.

Target player reveals their hand, then you choose a card other than a basic land card from it. Search that player's graveyard, hand, and library for all cards with the same name as the chosen card and exile them. Then that player shuffles.

({T}: Add {R}.)

Madblind Mountain enters the battlefield tapped.

{R}, {T}: Shuffle your library. Activate only if you control two or more red permanents.

{T}: Add {C}.

{T}: Draw a card. Activate only if you have exactly seven cards in hand.

Cumulative upkeep {1} (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.)

At the beginning of your upkeep, put a growth counter on Malignant Growth.

At the beginning of each opponent's draw step, that player draws an additional card for each growth counter on Malignant Growth, then Malignant Growth deals damage to the player equal to the number of cards they drew this way.

Enchant creature

Enchanted creature has "Cumulative upkeep {1}." (At the beginning of its controller's upkeep, that player puts an age counter on it, then sacrifices it unless they pay its upkeep cost for each age counter on it.)

{T}: Untap target attacking creature. Prevent all combat damage that would be dealt to and dealt by that creature this turn.

Whenever an opponent discards a card, Megrim deals 2 damage to that player.

Target player discards two cards.

Target player discards X cards at random.

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

{T}: Add one mana of any color among legendary creatures and planeswalkers you control.

{T}: Add {G}.

{T}: Add {B}.

{T}: Add {R}.

{T}: Add {U}.

During each of your turns, you may play a land and cast a permanent spell of each permanent type from your graveyard. (If a card has multiple permanent types, choose one as you play it.)

{T}: Counter target spell unless its controller pays {1} and 1 life.

Flying

At the beginning of your upkeep, sacrifice Nicol Bolas unless you pay {U}{B}{R}.

Whenever Nicol Bolas deals damage to an opponent, that player discards their hand.

Whenever Nine-Tail White Fox deals combat damage to a player, draw a card.

Flying

Whenever you draw a card, Niv-Mizzet, the Firemind deals 1 damage to any target.

{T}: Draw a card.

+2: Each opponent loses 1 life. You gain life equal to the life lost this way.

-2: Create a 5/5 black Demon creature token with flying. You lose 2 life.

-8: You get an emblem with "{1}{B}, Sacrifice a creature: You gain X life and draw X cards, where X is the sacrificed creature's power."

Ob Nixilis of the Black Oath can be your commander.

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

{T}: Add {B}, {R}, or {G}.

At the beginning of your upkeep, target opponent mills three cards, then you draw a card for each land card put into their graveyard this way.

Whenever you draw a card, each opponent mills two cards.

When Purple-Crystal Crab dies, draw a card.

Enchant creature

Enchanted creature has "{T}: This creature deals 1 damage to target player or planeswalker. You draw a card."

Whenever an opponent discards a card, that player loses 2 life.

Raid -- At the beginning of your end step, if you attacked this turn, target opponent discards a card.

When Ravenous Rats enters the battlefield, target opponent discards a card.

Flying, trample

Pay 2 life, Sacrifice another creature: Search your library for a card, put that card into your hand, then shuffle.

Look at the top X cards of target opponent's library. Exile one of those cards and put the rest back on top of that player's library in any order.

Target player draws two cards and loses 2 life.

{2}: Put the top card of your graveyard on the bottom of your library.

Storm Seeker deals damage to target player equal to the number of cards in that player's hand.

Target opponent discards a card at random, then discards a card.

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

At the beginning of your draw step, you may draw two additional cards. If you do, choose two cards in your hand drawn this turn. For each of those cards, pay 4 life or put the card on top of your library.

Flying

If Szadek, Lord of Secrets would deal combat damage to a player, instead put that many +1/+1 counters on Szadek and that player mills that many cards.

({T}: Add {R} or {G}.)

As The Mimeoplasm enters the battlefield, you may exile two creature cards from graveyards. If you do, it enters the battlefield as a copy of one of those cards with a number of additional +1/+1 counters on it equal to the power of the other card.

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

Eminence -- As long as The Ur-Dragon is in the command zone or on the battlefield, other Dragon spells you cast cost {1} less to cast.

Flying

Whenever one or more Dragons you control attack, draw that many cards, then you may put a permanent card from your hand onto the battlefield.

Repeat the following process X times. Each opponent loses 3 life unless that player sacrifices a nonland permanent or discards a card.

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

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

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

{2}{B}, {T}: Target player discards a card. Activate only as a sorcery.

{U}, {T}: Counter target spell unless its controller pays {1}.

Target opponent discards a card at random.

Delirium -- If there are four or more card types among cards in your graveyard, that player discards two cards at random instead.

At the beginning of each end step, each opponent loses life equal to the life they lost this turn. (Damage causes loss of life.)