Ribbon Snake

Flying
{2}: This creature loses flying until end of turn. Any player may activate this ability.

Bring Down

Assist (Another player can pay up to {3} of this spell's cost.)
Destroy target creature with power 4 or greater.

Vampire Charmseeker

Assist (Another player can pay up to {6} of this spell's cost.)
Flying
When this creature enters, return target instant, sorcery, or creature card from a graveyard to its owner's hand.

Rugged Prairie

{T}: Add {C}.
{R/W}, {T}: Add {R}{R}, {R}{W}, or {W}{W}.

Flailing Manticore

Flying, first strike
{1}: This creature gets +1/+1 until end of turn. Any player may activate this ability.
{1}: This creature gets -1/-1 until end of turn. Any player may activate this ability.

Vintara Elephant

Trample
{3}: This creature loses trample until end of turn. Any player may activate this ability.

Mana Cache

At the beginning of each player's end step, put a charge counter on this enchantment for each untapped land that player controls.
Remove a charge counter from this enchantment: Add {C}. Any player may activate this ability but only during their turn before the end step.

Infinite Hourglass

At the beginning of your upkeep, put a time counter on this artifact.
All creatures get +1/+0 for each time counter on this artifact.
{3}: Remove a time counter from this artifact. Any player may activate this ability but only during any upkeep step.

Horn of Plenty

Whenever a player casts a spell, they may pay {1}. If the player does, they draw a card at the beginning of the next end step.

Rhystic Cave

{T}: Choose a color. Add one mana of that color unless any player pays {1}. Activate only as an instant.

Exotic Orchard

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

Wishmonger

{2}: Target creature gains protection from the color of its controller's choice until end of turn. Any player may activate this ability.

Flailing Soldier

{1}: This creature gets +1/+1 until end of turn. Any player may activate this ability.
{1}: This creature gets -1/-1 until end of turn. Any player may activate this ability.

Huddle Up

Assist (Another player can pay up to {2} of this spell's cost.)
Two target players each draw a card.

Glittering Lion

Prevent all damage that would be dealt to this creature.
{3}: Until end of turn, this creature loses "Prevent all damage that would be dealt to this creature." Any player may activate this ability.

Mossfire Valley

Rhystic Scrying

Draw three cards. Then if any player pays {2}, discard three cards.

Island

Unifying Theory

Whenever a player casts a spell, that player may pay {2}. If the player does, they draw a card.

Academy Loremaster

At the beginning of each player's draw step, that player may draw an additional card. If they do, spells they cast this turn cost {2} more to cast.

Rhystic Syphon

Unless target player pays {3}, that player loses 5 life and you gain 5 life.

Feral Hydra

This creature enters with X +1/+1 counters on it.
{3}: Put a +1/+1 counter on this creature. Any player may activate this ability.

Aether Rift

At the beginning of your upkeep, discard a card at random. If you discard a creature card this way, return it from your graveyard to the battlefield unless any player pays 5 life.

Rhystic Deluge

{U}: Tap target creature unless its controller pays {1}.

Mountain

Cascade Bluffs

{T}: Add {C}.
{U/R}, {T}: Add {U}{U}, {U}{R}, or {R}{R}.

Gang Up

Assist (Another player can pay up to {X} of this spell's cost. You choose the value of X.)
Destroy target creature with power X or less.

Skycloud Expanse

Well of Knowledge

{2}: Draw a card. Any player may activate this ability but only during their draw step.

Deadly Designs

{2}: Put a plot counter on this enchantment. Any player may activate this ability.
When there are five or more plot counters on this enchantment, sacrifice it. If you do, destroy up to two target creatures.

Squallmonger

{2}: This creature deals 1 damage to each creature with flying and each player. Any player may activate this ability.

Crystal Quarry

{T}: Add {C}.
{5}, {T}: Add {W}{U}{B}{R}{G}.

Desolate Mire

Pure Reflection

Whenever a player casts a creature spell, destroy all Reflections. Then that player creates an X/X white Reflection creature token, where X is the mana value of that spell.

Swamp

Mercenaries

{3}: The next time this creature would deal damage to you this turn, prevent that damage. Any player may activate this ability.

Samite Sanctuary

{2}: Prevent the next 1 damage that would be dealt to target creature this turn. Any player may activate this ability.

Ice Cave

Whenever a player casts a spell, any other player may pay that spell's mana cost. If a player does, counter the spell. (Mana cost includes color.)

Rhystic Shield

Creatures you control get +0/+1 until end of turn. They get an additional +0/+2 until end of turn unless any player pays {2}.

Forest

Zerapa Minotaur

First strike
{2}: This creature loses first strike until end of turn. Any player may activate this ability.

Kamahl's Summons

Each player may reveal any number of creature cards from their hand. Then each player creates a 2/2 green Bear creature token for each card they revealed this way.

Task Mage Assembly

When there are no creatures on the battlefield, sacrifice this enchantment.
{2}: This enchantment deals 1 damage to target creature. Any player may activate this ability but only as a sorcery.

Glittering Lynx

Prevent all damage that would be dealt to this creature.
{2}: Until end of turn, this creature loses "Prevent all damage that would be dealt to this creature." Any player may activate this ability.

Sungrass Prairie

Ferrous Lake

Dash Hopes

When you cast this spell, any player may pay 5 life. If a player does, counter Dash Hopes.
Counter target spell.

Lightning Storm

Lightning Storm deals X damage to any target, where X is 3 plus the number of charge counters on Lightning Storm.
Discard a land card: Put two charge counters on Lightning Storm. You may choose a new target for it. Any player may activate this ability but only if Lightning Storm is on the stack.

Darkwater Catacombs

Fetid Heath

{T}: Add {C}.
{W/B}, {T}: Add {W}{W}, {W}{B}, or {B}{B}.

Mystic Gate

{T}: Add {C}.
{W/U}, {T}: Add {W}{W}, {W}{U}, or {U}{U}.

Saproling Cluster

{1}, Discard a card: Create a 1/1 green Saproling creature token. Any player may activate this ability.

Brawl

Until end of turn, all creatures gain "{T}: This creature deals damage equal to its power to target creature."

Graven Cairns

{T}: Add {C}.
{B/R}, {T}: Add {B}{B}, {B}{R}, or {R}{R}.

Flooded Grove

{T}: Add {C}.
{G/U}, {T}: Add {G}{G}, {G}{U}, or {U}{U}.

Game Plan

Assist (Another player can pay up to {5} of this spell's cost.)
Each player shuffles their hand and graveyard into their library, then draws seven cards. Exile Game Plan.

Prisoner's Dilemma

Each opponent secretly chooses silence or snitch, then the choices are revealed. If each opponent chose silence, Prisoner's Dilemma deals 4 damage to each of them. If each opponent chose snitch, Prisoner's Dilemma deals 8 damage to each of them. Otherwise, Prisoner's Dilemma deals 12 damage to each opponent who chose silence.
Flashback {5}{R}{R}

Play of the Game

Assist (Another player can pay up to {6} of this spell's cost.)
Exile all nonland permanents.

Quicksilver Wall

Defender (This creature can't attack.)
{4}: Return this creature to its owner's hand. Any player may activate this ability.

Sailmonger

{2}: Target creature gains flying until end of turn. Any player may activate this ability.

Volrath's Dungeon

Pay 5 life: Destroy this enchantment. Any player may activate this ability but only during their turn.
Discard a card: Target player puts a card from their hand on top of their library. Activate only as a sorcery.

Rhystic Circle

{1}: Any player may pay {1}. If no one does, the next time a source of your choice would deal damage to you this turn, prevent that damage.

Oath of Lieges

At the beginning of each player's upkeep, that player chooses target player who controls more lands than they do and is their opponent. The first player may search their library for a basic land card, put that card onto the battlefield, then shuffle.

Scandalmonger

{2}: Target player discards a card. Any player may activate this ability but only as a sorcery.

Armageddon Clock

At the beginning of your upkeep, put a doom counter on this artifact.
At the beginning of your draw step, this artifact deals damage equal to the number of doom counters on it to each player.
{4}: Remove a doom counter from this artifact. Any player may activate this ability but only during any upkeep step.

Sunken Ruins

{T}: Add {C}.
{U/B}, {T}: Add {U}{U}, {U}{B}, or {B}{B}.

Tidal Control

Cumulative upkeep {2} (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.)
Pay 2 life or {2}: Counter target red or green spell. Any player may activate this ability.

Land's Edge

Discard a card: If the discarded card was a land card, this enchantment deals 2 damage to target player or planeswalker. Any player may activate this ability.

Overflowing Basin

Fire-Lit Thicket

{T}: Add {C}.
{R/G}, {T}: Add {R}{R}, {R}{G}, or {G}{G}.

Wooded Bastion

{T}: Add {C}.
{G/W}, {T}: Add {G}{G}, {G}{W}, or {W}{W}.

Wall of Vipers

Defender (This creature can't attack.)
{3}: Destroy this creature and target creature it's blocking. Any player may activate this ability.

Vernal Equinox

Any player may cast creature and enchantment spells as though they had flash.

Lethal Vapors

Whenever a creature enters, destroy it.
{0}: Destroy this enchantment. You skip your next turn. Any player may activate this ability.

Xantcha, Sleeper Agent

Xantcha enters under the control of an opponent of your choice.
Xantcha attacks each combat if able and can't attack its owner or planeswalkers its owner controls.
{3}: Xantcha's controller loses 2 life and you draw a card. Any player may activate this ability.

Glademuse

Whenever a player casts a spell, if it's not their turn, that player draws a card.

Kenrith, the Returned King

{R}: All creatures gain trample and haste until end of turn.
{1}{G}: Put a +1/+1 counter on target creature.
{2}{W}: Target player gains 5 life.
{3}{U}: Target player draws a card.
{4}{B}: Put target creature card from a graveyard onto the battlefield under its owner's control.

Shadowblood Ridge

Flailing Ogre

Sunscorched Divide

Plains

Rhystic Tutor

Unless any player pays {2}, search your library for a card, put that card into your hand, then shuffle.

Excavation

{1}, Sacrifice a land: Draw a card. Any player may activate this ability.

Browbeat

Any player may have Browbeat deal 5 damage to them. If no one does, target player draws three cards.

Warmonger

{2}: This creature deals 1 damage to each creature without flying and each player. Any player may activate this ability.

Viridescent Bog

Coalition Victory

You win the game if you control a land of each basic land type and a creature of each color.

Out of Bounds

Assist (Another player can pay up to {3} of this spell's cost.)
Counter target spell.

Endbringer's Revel

{4}: Return target creature card from a graveyard to its owner's hand. Any player may activate this ability but only as a sorcery.

Twilight Mire

{T}: Add {C}.
{B/G}, {T}: Add {B}{B}, {B}{G}, or {G}{G}.

Rhystic Lightning

Rhystic Lightning deals 4 damage to any target unless that permanent's controller or that player pays {2}. If they do, Rhystic Lightning deals 2 damage to the permanent or player.

Ley Line

At the beginning of each player's upkeep, that player may put a +1/+1 counter on target creature of their choice.

Cascading Cataracts

Indestructible
{T}: Add {C}.
{5}, {T}: Add five mana in any combination of colors.

Command Tower

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

Nullhide Ferox

Hexproof
You can't cast noncreature spells.
{2}: This creature loses all abilities until end of turn. Any player may activate this ability.
If a spell or ability an opponent controls causes you to discard this card, put it onto the battlefield instead of putting it into your graveyard.