4 Castle Vantress
18 Island
4 Brazen Borrower // Petty Theft
3 Cancel
4 Cunning Nightbonder
4 Opt
3 Pouncing Shoreshark
2 Rain of Revelation
2 Sea-Dasher Octopus
4 Starlit Mantle
4 Stern Dismissal
4 Stormwing Entity
2 Teferi, Master of Time
2 Voracious Greatshark
Sideboard:
4 Brineborn Cutthroat
4 Didn't Say Please
4 Merfolk Secretkeeper // Venture Deeper
1 Rain of Revelation
4 Slitherwisp
4 Teferi's Tutelage
2 Wavebreak Hippocamp