Exile All Hallow's Eve with two scream counters on it.

At the beginning of your upkeep, if All Hallow's Eve is exiled with a scream counter on it, remove a scream counter from it. If there are no more scream counters on it, put it into your graveyard and each player returns all creature cards from their graveyard to the battlefield.

Target player draws three cards.

Enchant creature card in a graveyard

When Animate Dead enters the battlefield, if it's on the battlefield, it loses "enchant creature card in a graveyard" and gains "enchant creature put onto the battlefield with Animate Dead." Return enchanted creature card to the battlefield under your control and attach Animate Dead to it. When Animate Dead leaves the battlefield, that creature's controller sacrifices it.

Enchanted creature gets -1/-0.

Whenever a land enters the battlefield, Ankh of Mishra deals 2 damage to that land's controller.

Black creatures get +1/+1.

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

Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.)

Haste (This creature can attack and {T} as soon as it comes under your control.)

At the beginning of the end step, sacrifice Ball Lightning.

Basalt Monolith doesn't untap during your untap step.

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

{3}: Untap Basalt Monolith.

Target player draws X cards.

Draw three cards, then put two cards from your hand on top of your library in any order.

When Brine Hag dies, change the base power and toughness of all creatures that dealt damage to it this turn to 0/2. (This effect lasts indefinitely.)

Counter target spell.

Add {B}{B}{B}.

Enchant creature

Enchanted creature can't attack.

Prevent all combat damage that would be dealt by enchanted creature.

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

Cast this spell only during combat before blockers are declared.

Untap target attacking creature and remove it from combat. Gain control of that creature until end of turn.

Enchant creature

{0}: Enchanted creature becomes the color or colors of your choice. Activate only once each turn.

Enchant creature

When Earthbind enters the battlefield, if enchanted creature has flying, Earthbind deals 2 damage to that creature and Earthbind gains "Enchanted creature loses flying."

Players play with the top card of their libraries revealed.

Enchant creature

Enchanted creature has flying.

Copy target instant or sorcery spell, except that the copy is red. You may choose new targets for the copy.

All creatures lose flying.

{T}: Target player discards a card at random. Activate only during your turn.

{T}: Add {R}.

{T}: Target creature loses all landwalk abilities until end of turn.

{T}: You may tap or untap target artifact an opponent controls.

Whenever Infernal Medusa blocks a creature, destroy that creature at end of combat.

Whenever Infernal Medusa becomes blocked by a non-Wall creature, destroy that creature at end of combat.

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

Other Kobold creatures you control get +0/+1 and have trample.

Other Kobold creatures you control get +1/+0.

{B}: If Lesser Werewolf's power is 1 or more, it gets -1/-0 until end of turn and put a -0/-1 counter on target creature blocking or blocked by Lesser Werewolf. Activate only during the declare blockers step.

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.

{4}, {T}: Put a matrix counter on target creature and that creature gains "Remove a matrix counter from this creature: Regenerate this creature." Activate only during your upkeep.

Lightning Bolt deals 3 damage to any target.

All Walls able to block Marble Priest do so.

Prevent all combat damage that would be dealt to Marble Priest by Walls.

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

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.

Attacking creatures you control get +1/+0.

{B}{R}: Pavel Maliki gets +1/+0 until end of turn.

{T}: Add {U}.

Psionic Blast deals 4 damage to any target and 2 damage to you.

First strike

Choose one --

• Counter target blue spell.

• Destroy target blue permanent.

Cast this spell only during an opponent's turn after their upkeep step.

Untap all lands you control.

Flying

Rock Hydra enters the battlefield with X +1/+1 counters on it.

For each 1 damage that would be dealt to Rock Hydra, if it has a +1/+1 counter on it, remove a +1/+1 counter from it and prevent that 1 damage.

{R}: Prevent the next 1 damage that would be dealt to Rock Hydra this turn.

{R}{R}{R}: Put a +1/+1 counter on Rock Hydra. Activate only during your upkeep.

Rocky Tar Pit enters the battlefield tapped.

{T}, Sacrifice Rocky Tar Pit: Search your library for a Swamp or Mountain card, put it onto the battlefield, then shuffle.

Sedge Troll gets +1/+1 as long as you control a Swamp.

{B}: Regenerate Sedge Troll.

Swampwalk (This creature can't be blocked as long as defending player controls a Swamp.)

Whenever a player casts a black spell, you gain 1 life.

Enchant creature

Enchanted creature has shroud as long as it's untapped. (It can't be the target of spells or abilities.)

{T}: Destroy target blue creature.

({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}.)

({T}: Add {B}.)

({T}: Add {B}.)

Sword of the Ages enters the battlefield tapped.

{T}, Sacrifice Sword of the Ages and any number of creatures you control: Sword of the Ages deals X damage to any target, where X is the total power of the creatures sacrificed this way, then exile Sword of the Ages and those creature cards.

Phasing (This phases in or out before you untap during each of your untap steps. While it's phased out, it's treated as though it doesn't exist.)

Teferi's Isle enters the battlefield tapped.

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

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

As The Rack enters the battlefield, choose an opponent.

At the beginning of the chosen player's upkeep, The Rack deals X damage to that player, where X is 3 minus the number of cards in their hand.

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

{1}, Pay 1 life: Draw a card, then discard a card.

{T}: Add {B}.

{T}: Target creature loses first strike or swampwalk until end of turn.

You may have Vesuvan Doppelganger enter the battlefield as a copy of any creature on the battlefield, except it doesn't copy that creature's color and it has "At the beginning of your upkeep, you may have this creature become a copy of target creature, except it doesn't copy that creature's color and it has this ability."

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

{B}: Regenerate Walking Dead.

Defender (This creature can't attack.)

Protection from white

Prevent all damage that would be dealt to Wall of Putrid Flesh by enchanted creatures.

Defender (This creature can't attack.)

At the beginning of your upkeep, change Wall of Tombstones's base toughness to 1 plus the number of creature cards in your graveyard. (This effect lasts indefinitely.)

Each player shuffles the cards from their hand into their library, then draws that many cards.

As an additional cost to cast this spell, pay 3 life.

Counter target creature spell.

Other Zombie creatures have swampwalk. (They can't be blocked as long as defending player controls a Swamp.)

Other Zombies have "{B}: Regenerate this permanent."