Seething Song

Aven Augur

Flying
Sacrifice Aven Augur: Return up to two target creatures to their owners' hands. Activate only during your upkeep.

Quicksilver Dagger

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

Ideas Unbound

Draw three cards. Discard three cards at the beginning of the next end step.

Brainstorm

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

Electrickery

Electrickery deals 1 damage to target creature you don't control.
Overload {1}{R} (You may cast this spell for its overload cost. If you do, change "target" in its text to "each.")

Gitaxian Probe

({U/P} can be paid with either {U} or 2 life.)
Look at target player's hand.
Draw a card.

Rootwater Mystic

{1}{U}: Look at the top card of target player's library.

Flame Slash

Flame Slash deals 4 damage to target creature.

Mountain

Goblin Electromancer

Instant and sorcery spells you cast cost {1} less to cast.

Seal of Fire

Sacrifice Seal of Fire: It deals 2 damage to any target.

Peek

Look at target player's hand.
Draw a card.

Foil

You may discard an Island card and another card rather than pay this spell's mana cost.
Counter target spell.

Walking Atlas

{T}: You may put a land card from your hand onto the battlefield.

Sage of Epityr

When Sage of Epityr enters the battlefield, look at the top four cards of your library, then put them back in any order.

Fireblast

You may sacrifice two Mountains rather than pay this spell's mana cost.
Fireblast deals 4 damage to any target.

Insectile Aberration

Delver of Secrets

At the beginning of your upkeep, look at the top card of your library. You may reveal that card. If an instant or sorcery card is revealed this way, transform Delver of Secrets.

Delver of Secrets // Insectile Aberration

Red Elemental Blast

Choose one —
• Counter target blue spell.
• Destroy target blue permanent.

Alloy Myr

Cephalid Pathmage

Cephalid Pathmage can't be blocked.
{T}, Sacrifice Cephalid Pathmage: Target creature can't be blocked this turn.

Leap

Target creature gains flying until end of turn.
Draw a card.

Pyromantic Pilgrim

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

Gut Shot

({R/P} can be paid with either {R} or 2 life.)
Gut Shot deals 1 damage to any target.

Consider

Surveil 1. (Look at the top card of your library. You may put it into your graveyard.)
Draw a card.

Izzet Chronarch

When Izzet Chronarch enters the battlefield, return target instant or sorcery card from your graveyard to your hand.

Drowner Initiate

Whenever a player casts a blue spell, you may pay {1}. If you do, target player mills two cards.

Aura Flux

Other enchantments have "At the beginning of your upkeep, sacrifice this enchantment unless you pay {2}."

Capsize

Buyback {3} (You may pay an additional {3} as you cast this spell. If you do, put this card into your hand as it resolves.)
Return target permanent to its owner's hand.

Counterspell

Fire Ambush

Fire Ambush deals 3 damage to any target.

Pendrell Flux

Enchant creature
Enchanted creature has "At the beginning of your upkeep, sacrifice this creature unless you pay its mana cost."

Mob Justice

Mob Justice deals damage to target player or planeswalker equal to the number of creatures you control.

Sigil of Sleep

Enchant creature
Whenever enchanted creature deals damage to a player, return target creature that player controls to its owner's hand.

Pyroblast

Choose one —
• Counter target spell if it's blue.
• Destroy target permanent if it's blue.

Alexi's Cloak

Flash
Enchant creature
Enchanted creature has shroud. (It can't be the target of spells or abilities.)

Arcane Signet

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

Anarchist

When Anarchist enters the battlefield, you may return target sorcery card from your graveyard to your hand.

Cerulean Wisps

Target creature becomes blue until end of turn. Untap that creature.
Draw a card.

Lava Spike

Lava Spike deals 3 damage to target player or planeswalker.

Serum Visions

Murmuring Mystic

Whenever you cast an instant or sorcery spell, create a 1/1 blue Bird Illusion creature token with flying.

Preordain

Scry 2, then draw a card. (To scry 2, look at the top two cards of your library, then put any number of them on the bottom and the rest on top in any order.)

Archaeomancer

When Archaeomancer enters the battlefield, return target instant or sorcery card from your graveyard to your hand.

Merrow Levitator

{T}: Target creature gains flying until end of turn.
Whenever you cast a blue spell, you may untap Merrow Levitator.

Prodigal Pyromancer

{T}: Prodigal Pyromancer deals 1 damage to any target.

Island

Arcane Denial

Counter target spell. Its controller may draw up to two cards at the beginning of the next turn's upkeep.
You draw a card at the beginning of the next turn's upkeep.

Jace's Erasure

Whenever you draw a card, you may have target player mill a card.

Silverbluff Bridge

Silverbluff Bridge enters the battlefield tapped.
Indestructible
{T}: Add {U} or {R}.

Broken Dam

Tap one or two target creatures without horsemanship.

Cloudkin Seer

Flying
When Cloudkin Seer enters the battlefield, draw a card.

Words of Wisdom

You draw two cards, then each other player draws a card.

Diplomatic Immunity

Enchant creature
Shroud (A permanent with shroud can't be the target of spells or abilities.)
Enchanted creature has shroud.

Izzet Signet

Freed from the Real

Enchant creature
{U}: Tap enchanted creature.
{U}: Untap enchanted creature.

Shadow Rift

Target creature gains shadow until end of turn. (It can block or be blocked by only creatures with shadow.)
Draw a card.

Vision Skeins

Curse of the Bloody Tome

Enchant player
At the beginning of enchanted player's upkeep, that player mills two cards.

Opaline Unicorn

Merchant of Secrets

When Merchant of Secrets enters the battlefield, draw a card.

Faerie Seer

Flying
When Faerie Seer enters the battlefield, scry 2.

Curse of the Pierced Heart

Enchant player
At the beginning of enchanted player's upkeep, Curse of the Pierced Heart deals 1 damage to that player or a planeswalker that player controls.

Adeliz, the Cinder Wind

Flying, haste
Whenever you cast an instant or sorcery spell, Wizards you control get +1/+1 until end of turn.

Wizard Replica

Flying
{U}, Sacrifice Wizard Replica: Counter target spell unless its controller pays {2}.

Crimson Wisps

Target creature becomes red and gains haste until end of turn.
Draw a card.

Hydroblast

Choose one —
• Counter target spell if it's red.
• Destroy target permanent if it's red.

Naiad of Hidden Coves

As long as it's not your turn, spells you cast cost {1} less to cast.

Decanter of Endless Water

You have no maximum hand size.
{T}: Add one mana of any color.

End the Festivities

End the Festivities deals 1 damage to each opponent and each creature and planeswalker they control.