Instants/Sorceries:

1 Blink of an Eye
1 Delay
1 Fact or Fiction
1 Into the Roil
1 Lat-Nam's Legacy
1 Lazotep Plating
1 Long-Term Plans
1 Negate
1 Paradoxical Outcome
1 Pongify
1 Reality Shift
1 Spell Pierce
1 Stoic Rebuttal
1 Winds of Rebuke

Artifacts:

1 Chalice of the Void
1 Expedition Map
1 Fellwar Stone
1 Inspiring Statuary
1 Mind Stone
1 Mishra's Bauble
1 Pithing Needle
1 Scroll Rack
1 Silent Submersible
1 Smuggler's Copter
1 Sorcerous Spyglass
1 Storage Matrix
1 Tangle Wire
1 Urza's Incubator

Enchantments:

1 As Foretold
1 Copy Artifact
1 Counterbalance
1 Mana Maze
1 Search for Azcanta
1 Training Grounds
1 Verity Circle

Lands:

1 Command Beacon
1 Homeward Path
1 Isolated Watchtower
1 Gemstone Caverns

What we're giving up playing Tidespout:

1 Gilded Drake
1 Trinket Mage
1 Trophy Mage
1 Etherium Sculptor
1 Phyrexian Revoker
1 Sai, Master Thopterist
1 Spellseeker