Aven Surveyor

Flying
When Aven Surveyor enters, choose one —
• Put a +1/+1 counter on Aven Surveyor.
• Return target creature to its owner's hand.

Eidolon of Philosophy

{6}{U}, Sacrifice Eidolon of Philosophy: Draw three cards.

Vexing Gull

Spire Monitor

Flash (You may cast this spell any time you could cast an instant.)
Flying

Fountain of Ichor

{T}: Add one mana of any color.
{3}: Fountain of Ichor becomes a 3/3 Dinosaur artifact creature until end of turn.

Windcaller Aven

Flying
Cycling {U} ({U}, Discard this card: Draw a card.)
When you cycle Windcaller Aven, target creature gains flying until end of turn.

Gone Missing

Put target permanent on top of its owner's library.
Investigate. (Create a Clue token. It's an artifact with "{2}, Sacrifice this artifact: Draw a card.")

Meteorite

When Meteorite enters, it deals 2 damage to any target.
{T}: Add one mana of any color.

Maritime Guard

Soul of the Rapids

Flying
Hexproof (This creature can't be the target of spells or abilities your opponents control.)

Uncomfortable Chill

Creatures your opponents control get -2/-0 until end of turn.
Draw a card.

Furtive Homunculus

Skulk (This creature can't be blocked by creatures with greater power.)

Lumengrid Warden

Crush Dissent

Counter target spell unless its controller pays {2}.
Amass Zombies 2. (Put two +1/+1 counters on an Army you control. It's also a Zombie. If you don't control an Army, create a 0/0 black Zombie Army creature token first.)

Glimpse of Freedom

Draw a card.
Escape—{2}{U}, Exile five other cards from your graveyard. (You may cast this card from your graveyard for its escape cost.)

Sift

String of Disappearances

Return target creature to its owner's hand. Then that creature's controller may pay {U}{U}. If the player does, they may copy this spell and may choose a new target for that copy.

Swirling Torrent

Choose one or both —
• Put target creature on top of its owner's library.
• Return target creature to its owner's hand.

Nephalia Seakite

Prying Eyes

Spinning Wheel

{T}: Add one mana of any color.
{5}, {T}: Tap target creature.

Wind Strider

Gearsmith Prodigy

Gearsmith Prodigy gets +1/+0 as long as you control an artifact.

Fugitive Wizard

Failed Inspection

Counter target spell. Draw a card, then discard a card.

Weave Fate

Elite Instructor

When Elite Instructor enters, draw a card, then discard a card.

Sage's Row Denizen

Whenever another blue creature you control enters, target player mills two cards.

Powerstone Shard

{T}: Add {C} for each artifact you control named Powerstone Shard.

Hinterland Drake

Flying
Hinterland Drake can't block artifact creatures.

Air Elemental

Just the Wind

Return target creature to its owner's hand.
Madness {U} (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.)

Memory Drain

Coralhelm Guide

{4}{U}: Target creature can't be blocked this turn.

Coral Merfolk

Glimmerbell

Bone to Ash

Counter target creature spell.
Draw a card.

Erratic Visionary

{1}{U}, {T}: Draw a card, then discard a card.

Choking Tethers

Tap up to four target creatures.
Cycling {1}{U} ({1}{U}, Discard this card: Draw a card.)
When you cycle Choking Tethers, you may tap target creature.

Crystacean

Divination

Into the Void

Return up to two target creatures to their owners' hands.

Havengul Skaab

Whenever Havengul Skaab attacks, return another creature you control to its owner's hand.

Run Aground

Put target artifact or creature on top of its owner's library.

Alirios, Enraptured

Alirios, Enraptured enters tapped.
Alirios doesn't untap during your untap step if you control a Reflection.
When Alirios enters, create a 3/2 blue Reflection creature token.

Sea God's Scorn

Return up to three target creatures and/or enchantments to their owners' hands.

Orazca Relic

Ascend (If you control ten or more permanents, you get the city's blessing for the rest of the game.)
{T}: Add {C}.
{T}, Sacrifice Orazca Relic: You gain 3 life and draw a card. Activate only if you have the city's blessing.

Catalog

Island

Facet Reader

{1}, {T}: Draw a card, then discard a card.

Floodwaters

Return up to two target creatures to their owners' hands.
Cycling {2} ({2}, Discard this card: Draw a card.)

Scuttlemutt

{T}: Add one mana of any color.
{T}: Target creature becomes the color or colors of your choice until end of turn.

Warden of the Wall

Warden of the Wall enters tapped.
{T}: Add {C}.
During turns other than yours, Warden of the Wall is a 2/3 Gargoyle artifact creature with flying.

Rage of Winter

Tap target creature. It doesn't untap during its controller's next untap step. (Then exile this card. You may cast the creature later from exile.)

Queen of Ice

Whenever Queen of Ice deals combat damage to a creature, tap that creature. It doesn't untap during its controller's next untap step.