Soul Barrier

Whenever an opponent casts a creature spell, this enchantment deals 2 damage to that player unless they pay {2}.

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.

Rootwater Depths

{T}: Add {C}.
{T}: Add {U} or {B}. This land doesn't untap during your next untap step.

Soul Strings

Return two target creature cards from your graveyard to your hand unless any player pays {X}.

Shivan Wumpus

Trample
When this creature enters, any player may sacrifice a land of their choice. If a player does, put this creature on top of its owner's library.

Mana Tithe

Counter target spell unless its controller pays {1}.

Dash Hopes

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

Swamp

Karona, False God

Haste
At the beginning of each player's upkeep, that player untaps Karona and gains control of it.
Whenever Karona attacks, creatures of the creature type of your choice get +3/+3 until end of turn.

Castle Sengir

{T}: Add {C}.
{1}, {T}: Add {B}.
{2}, {T}: Add {U} or {R}.

Wishmonger

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

Aysen Abbey

{T}: Add {C}.
{1}, {T}: Add {W}.
{2}, {T}: Add {G} or {U}.

Mercenaries

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

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.

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.

Wizards' School

{T}: Add {C}.
{1}, {T}: Add {U}.
{2}, {T}: Add {W} or {B}.

Carrion Rats

Whenever this creature attacks or blocks, any player may exile a card from their graveyard. If a player does, this creature assigns no combat damage this turn.

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 Tutor

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

Nakaya Shade

{B}: This creature gets +1/+1 until end of turn unless any player pays {2}.

Excise

Exile target attacking creature unless its controller pays {X}.

Wild Might

Target creature gets +1/+1 until end of turn. That creature gets an additional +4/+4 until end of turn unless any player pays {2}.

Forest

Oona's Prowler

Flying
Discard a card: This creature gets -2/-0 until end of turn. Any player may activate this ability.

Rhystic Study

Whenever an opponent casts a spell, you may draw a card unless that player pays {1}.

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.

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.

Samite Sanctuary

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

Scandalmonger

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

Well of Knowledge

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

Ribbon Snake

Flying
{2}: This creature loses flying until end of turn. 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.

Rhystic Deluge

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

Zerapa Minotaur

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

Leery Fogbeast

Whenever this creature becomes blocked, prevent all combat damage that would be dealt this turn.

Island

Forsaken City

This land doesn't untap during your untap step.
At the beginning of your upkeep, you may exile a card from your hand. If you do, untap this land.
{T}: Add one mana of any color.

Mogg Hollows

{T}: Add {C}.
{T}: Add {R} or {G}. This land doesn't untap during your next untap step.

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}.

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.

Unifying Theory

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

Prowling Pangolin

When this creature enters, any player may sacrifice two creatures of their choice. If a player does, sacrifice this creature.

Capricopian

This creature enters with X +1/+1 counters on it.
{2}: Put a +1/+1 counter on this creature, then you may reselect which player this creature is attacking. Only the player this creature is attacking may activate this ability and only during the declare attackers step. (It can't attack its controller.)

Rhystic Syphon

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

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.

Rhystic Scrying

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

Mountain

Carrion Wurm

Whenever this creature attacks or blocks, any player may exile three cards from their graveyard. If a player does, this creature assigns no combat damage this turn.

Pinecrest Ridge

Cloudcrest Lake

{T}: Add {C}.
{T}: Add {W} or {U}. This land doesn't untap during your next untap step.

Flailing Ogre

Cinder Marsh

{T}: Add {C}.
{T}: Add {B} or {R}. This land doesn't untap during your next untap step.

Vec Townships

{T}: Add {C}.
{T}: Add {G} or {W}. This land doesn't untap during your next untap step.

Phantasmagorian

When you cast this spell, any player may discard three cards. If a player does, counter Phantasmagorian.
Discard three cards: Return this card from your graveyard to your hand.

Squallmonger

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

Rhystic Cave

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

Mana Leak

Counter target spell unless its controller pays {3}.

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.

Arcum's Whistle

{3}, {T}: Choose target non-Wall creature the active player has controlled continuously since the beginning of the turn. That player may pay {X}, where X is that creature's mana value. If they don't pay, the creature attacks this turn if able, and at the beginning of the next end step, destroy it if it didn't attack this turn. Activate only before attackers are declared.

Lantern-Lit Graveyard

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.

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.

Excavation

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

Thalakos Lowlands

Warmonger

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

Errant Minion

Enchant creature
At the beginning of the upkeep of enchanted creature's controller, that player may pay any amount of mana. This Aura deals 2 damage to that player. Prevent X of that damage, where X is the amount of mana that player paid this way.

Waterveil Cavern

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.

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.

Ignoble Soldier

Whenever this creature becomes blocked, prevent all combat damage that would be dealt by it this turn.

Quicksilver Wall

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

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.

Sailmonger

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

An-Havva Township

{T}: Add {C}.
{1}, {T}: Add {G}.
{2}, {T}: Add {R} or {W}.

Koskun Keep

{T}: Add {C}.
{1}, {T}: Add {R}.
{2}, {T}: Add {B} or {G}.

Plains

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.

Spell Pierce

Counter target noncreature spell unless its controller pays {2}.

Oasis

{T}: Prevent the next 1 damage that would be dealt to target creature this turn.

Vintara Elephant

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

Tranquil Garden

Coveted Jewel

When this artifact enters, draw three cards.
{T}: Add three mana of any one color.
Whenever one or more creatures an opponent controls attack you and aren't blocked, that player draws three cards and gains control of this artifact. Untap it.

Kazuul, Tyrant of the Cliffs

Whenever a creature an opponent controls attacks, if you're the defending player, create a 3/3 red Ogre creature token unless that creature's controller pays {3}.

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.

Leonin Arbiter

Players can't search libraries. Any player may pay {2} for that player to ignore this effect until end of turn.