Counter target spell unless its controller pays {1}. You create a 1/1 colorless Eldrazi Scion creature token. It has "Sacrifice this creature: Add {C}." ({C} represents colorless mana.)
{3}{W}
Alms Collector
Creature - Cat Cleric
Flash
If an opponent would draw two or more cards, instead you and that player each draw a card.
3 /
4
{1}{U}
Alter Reality
Instant
Change the text of target spell or permanent by replacing all instances of one color word with another. (This effect lasts indefinitely.)
Flashback {1}{U} (You may cast this card from your graveyard for its flashback cost. Then exile it.)
{5}{W}{W}
Angel of the Dire Hour
Creature - Angel
Flash
Flying
When Angel of the Dire Hour enters the battlefield, if you cast it from your hand, exile all attacking creatures.
5 /
4
{1}{U}{U}{ // }{1}{U}
Brazen Borrower // Petty Theft
Creature - Faerie Rogue // Instant - Adventure
Flash
Flying
Brazen Borrower can block only creatures with flying.
Return target nonland permanent an opponent controls to its owner's hand.
3 /
1
{2}{U}{U}
Breaking Wave
Sorcery
You may cast Breaking Wave as though it had flash if you pay {2} more to cast it. (You may cast it any time you could cast an instant.)
Simultaneously untap all tapped creatures and tap all untapped creatures.
{W}
Cloudshift
Instant
Exile target creature you control, then return that card to the battlefield under your control.
{1}{W}
Containment Priest
Creature - Human Cleric
Flash
If a nontoken creature would enter the battlefield and it wasn't cast, exile it instead.
2 /
2
{3}{U}
Crafty Cutpurse
Creature - Human Pirate
Flash
When Crafty Cutpurse enters the battlefield, each token that would be created under an opponent's control this turn is created under your control instead.
2 /
2
{2}{U}
Deceiver Exarch
Creature - Phyrexian Cleric
Flash (You may cast this spell any time you could cast an instant.)
When Deceiver Exarch enters the battlefield, choose one --
• Untap target permanent you control.
• Tap target permanent an opponent controls.
1 /
4
{2}{U}
Displace
Instant
Exile up to two target creatures you control, then return those cards to the battlefield under their owner's control.
{4}{U}{U}
Draining Whelk
Creature - Illusion
Flash
Flying
When Draining Whelk enters the battlefield, counter target spell. Put X +1/+1 counters on Draining Whelk, where X is that spell's mana value.
1 /
1
{2}{W}{W}
Dust Elemental
Creature - Elemental
Flash (You may cast this spell any time you could cast an instant.)
Flying; fear (This creature can't be blocked except by artifact creatures and/or black creatures.)
When Dust Elemental enters the battlefield, return three creatures you control to their owner's hand.
6 /
6
{1}{U}
Eel Umbra
Enchantment - Aura
Flash (You may cast this spell any time you could cast an instant.)
Enchant creature
Enchanted creature gets +1/+1.
Totem armor (If enchanted creature would be destroyed, instead remove all damage from it and destroy this Aura.)
{2}{W}
Eerie Interlude
Instant
Exile any number of target creatures you control. Return those cards to the battlefield under their owner's control at the beginning of the next end step.
{5}{W}{U}
Emergency Powers
Instant
Each player shuffles their hand and graveyard into their library, then draws seven cards. Exile Emergency Powers.
Addendum -- If you cast this spell during your main phase, you may put a permanent card with mana value 7 or less from your hand onto the battlefield.
{1}{U}
Encase in Ice
Enchantment - Aura
Flash (You may cast this spell any time you could cast an instant.)
Enchant red or green creature
When Encase in Ice enters the battlefield, tap enchanted creature.
Enchanted creature doesn't untap during its controller's untap step.
{2}{W}{U}
Ephara, God of the Polis
Legendary Enchantment Creature - God
Indestructible
As long as your devotion to white and blue is less than seven, Ephara isn't a creature.
At the beginning of each upkeep, if you had another creature enter the battlefield under your control last turn, draw a card.
6 /
5
{W}
Ephemerate
Instant
Exile target creature you control, then return it to the battlefield under its owner's control.
Rebound (If you cast this spell from your hand, exile it as it resolves. At the beginning of your next upkeep, you may cast this card from exile without paying its mana cost.)
{U}
Essence Flux
Instant
Exile target creature you control, then return that card to the battlefield under its owner's control. If it's a Spirit, put a +1/+1 counter on it.
{2}{U}{U}
Geist Snatch
Instant
Counter target creature spell. Create a 1/1 blue Spirit creature token with flying.
{2}{U}
Ghostly Flicker
Instant
Exile two target artifacts, creatures, and/or lands you control, then return those cards to the battlefield under your control.
{3}{W}{W}
Hixus, Prison Warden
Legendary Creature - Human Soldier
Flash (You may cast this spell any time you could cast an instant.)
Whenever a creature deals combat damage to you, if Hixus, Prison Warden entered the battlefield this turn, exile that creature until Hixus leaves the battlefield. (That creature returns under its owner's control.)
4 /
4
{4}{U}
Illusory Ambusher
Creature - Cat Illusion
Flash (You may cast this spell any time you could cast an instant.)
Whenever Illusory Ambusher is dealt damage, draw that many cards.
4 /
1
--
Isolated Watchtower
Land
{T}: Add {C}.
{2}, {T}: Scry 1, then you may reveal the top card of your library. If a basic land card is revealed this way, put it onto the battlefield tapped. Activate only if an opponent controls at least two more lands than you.
{1}{W}
Jeskai Barricade
Creature - Wall
Flash (You may cast this spell any time you could cast an instant.)
Defender
When Jeskai Barricade enters the battlefield, you may return another target creature you control to its owner's hand.
0 /
4
{8}{U}{U}
Jin-Gitaxias, Core Augur
Legendary Creature - Phyrexian Praetor
Flash
At the beginning of your end step, draw seven cards.
Each opponent's maximum hand size is reduced by seven.
5 /
4
{1}{W}{U}
Lawmage's Binding
Enchantment - Aura
Flash
Enchant creature
Enchanted creature can't attack or block, and its activated abilities can't be activated.
{1}{U}
Lazotep Plating
Instant
Amass 1. (Put a +1/+1 counter on an Army you control. If you don't control one, create a 0/0 black Zombie Army creature token first.)
You and permanents you control gain hexproof until end of turn. (You and they can't be the targets of spells or abilities your opponents control.)
{2}{W}
Masako the Humorless
Legendary Creature - Human Advisor
Flash
Tapped creatures you control can block as though they were untapped.
2 /
1
{2}{U}
Mizzium Meddler
Creature - Vedalken Wizard
Flash (You may cast this spell any time you could cast an instant.)
When Mizzium Meddler enters the battlefield, you may change a target of target spell or ability to Mizzium Meddler.
1 /
4
{1}{W}
Momentary Blink
Instant
Exile target creature you control, then return it to the battlefield under its owner's control.
Flashback {3}{U} (You may cast this card from your graveyard for its flashback cost. Then exile it.)
{1}{U}
Mystic Subdual
Enchantment - Aura
Flash
Enchant creature
Enchanted creature gets -2/-0 and loses all abilities. (Mutating onto the creature won't give it new abilities. It can gain abilities in other ways.)
{1}{U}
Mystic Veil
Enchantment - Aura
You may cast Mystic Veil as though it had flash. If you cast it any time a sorcery couldn't have been cast, the controller of the permanent it becomes sacrifices it at the beginning of the next cleanup step.
Enchant creature
Enchanted creature has shroud. (It can't be the target of spells or abilities.)
{2}{U}{U}
Naru Meha, Master Wizard
Legendary Creature - Human Wizard
Flash
When Naru Meha, Master Wizard enters the battlefield, copy target instant or sorcery spell you control. You may choose new targets for the copy.
Other Wizards you control get +1/+1.
3 /
3
{2}{W}{U}
Ojutai's Command
Instant
Choose two --
• Return target creature card with mana value 2 or less from your graveyard to the battlefield.
• You gain 4 life.
• Counter target creature spell.
• Draw a card.
{2}{W}
Omen of the Sun
Enchantment
Flash
When Omen of the Sun enters the battlefield, create two 1/1 white Human Soldier creature tokens and you gain 2 life.
{2}{W}, Sacrifice Omen of the Sun: Scry 2.
{5}{U}{U}
Pearl Lake Ancient
Creature - Leviathan
Flash
This spell can't be countered.
Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)
Return three lands you control to their owner's hand: Return Pearl Lake Ancient to its owner's hand.
6 /
7
{W/U}{W/U}{W/U}
Plumeveil
Creature - Elemental
Flash
Defender, flying
4 /
4
{2}{U}
Portal Mage
Creature - Human Wizard
Flash
When Portal Mage enters the battlefield during the declare attackers step, you may reselect which player or planeswalker target attacking creature is attacking. (It can't attack its controller or its controller's planeswalkers.)
2 /
2
{1}{U}
Quickling
Creature - Faerie Rogue
Flash (You may cast this spell any time you could cast an instant.)
Flying
When Quickling enters the battlefield, sacrifice it unless you return another creature you control to its owner's hand.
2 /
2
{3}{W/U}
Repel Intruders
Instant
Create two 1/1 white Kithkin Soldier creature tokens if {W} was spent to cast this spell. Counter up to one target creature spell if {U} was spent to cast this spell. (Do both if {W}{U} was spent.)
{1}{U}{U}
Sea-Dasher Octopus
Creature - Octopus
Mutate {1}{U} (If you cast this spell for its mutate cost, put it over or under target non-Human creature you own. They mutate into the creature on top plus all abilities from under it.)
Flash
Whenever this creature deals combat damage to a player, draw a card.
2 /
2
{1}{W}
Seal Away
Enchantment
Flash
When Seal Away enters the battlefield, exile target tapped creature an opponent controls until Seal Away leaves the battlefield.
{3}{W}
Selfless Squire
Creature - Human Soldier
Flash
When Selfless Squire enters the battlefield, prevent all damage that would be dealt to you this turn.
Whenever damage that would be dealt to you is prevented, put that many +1/+1 counters on Selfless Squire.
1 /
1
{1}{W}
Sentinel's Mark
Enchantment - Aura
Flash
Enchant creature
Enchanted creature gets +1/+2 and has vigilance.
Addendum -- When Sentinel's Mark enters the battlefield, if you cast it during your main phase, enchanted creature gains lifelink until end of turn.
{1}{U}
Snapcaster Mage
Creature - Human Wizard
Flash
When Snapcaster Mage enters the battlefield, target instant or sorcery card in your graveyard gains flashback until end of turn. The flashback cost is equal to its mana cost. (You may cast that card from your graveyard for its flashback cost. Then exile it.)
2 /
1
{1}{W}{U}
Spell Queller
Creature - Spirit
Flash
Flying
When Spell Queller enters the battlefield, exile target spell with mana value 4 or less.
When Spell Queller leaves the battlefield, the exiled card's owner may cast that card without paying its mana cost.
2 /
3
{1}{U}
Starlit Mantle
Enchantment - Aura
Flash
Enchant creature you control
When Starlit Mantle enters the battlefield, enchanted creature gains hexproof until end of turn. (It can't be the target of spells or abilities your opponents control.)
Enchanted creature gets +1/+1.
{1}{W}{W}
Stasis Snare
Enchantment
Flash (You may cast this spell any time you could cast an instant.)
When Stasis Snare enters the battlefield, exile target creature an opponent controls until Stasis Snare leaves the battlefield. (That creature returns under its owner's control.)
{3}{U}
Stunt Double
Creature - Shapeshifter
Flash
You may have Stunt Double enter the battlefield as a copy of any creature on the battlefield.
0 /
0
{2}{U}{U}
Summoner's Bane
Instant
Counter target creature spell. Create a 2/2 blue Illusion creature token.
--
Terrain Generator
Land
{T}: Add {C}.
{2}, {T}: You may put a basic land card from your hand onto the battlefield tapped.
--
Thawing Glaciers
Land
Thawing Glaciers enters the battlefield tapped.
{1}, {T}: Search your library for a basic land card, put that card onto the battlefield tapped, then shuffle. Return Thawing Glaciers to its owner's hand at the beginning of the next cleanup step.
{1}{W/U}{W/U}{W/U}
Thistledown Liege
Creature - Kithkin Knight
Flash
Other white creatures you control get +1/+1.
Other blue creatures you control get +1/+1.
1 /
3
{3}{U}{U}
Thryx, the Sudden Storm
Legendary Creature - Elemental Giant
Flash
Flying
Spells you cast with mana value 5 or greater cost {1} less to cast and can't be countered.
4 /
5
{1}{U}{U}
Vendilion Clique
Legendary Creature - Faerie Wizard
Flash
Flying
When Vendilion Clique enters the battlefield, look at target player's hand. You may choose a nonland card from it. If you do, that player reveals the chosen card, puts it on the bottom of their library, then draws a card.
3 /
1
{2}{U}{U}
Venser, Shaper Savant
Legendary Creature - Human Wizard
Flash
When Venser, Shaper Savant enters the battlefield, return target spell or permanent to its owner's hand.
2 /
2
{3}{U}{U}
Voracious Greatshark
Creature - Shark
Flash
When Voracious Greatshark enters the battlefield, counter target artifact or creature spell.