1-33 of 33 cards where the types include “spell” and the cost is greater than 3 and (the region is Bilgewater or the region is Shadow Isles)

Atrocity
Brood Awakening
Chum the Waters
Crumble
Double Up
Encroaching Shadows
Fizz's Playful Trickster
Grasp of the Undying
Keelbreaker
Kindred's Spirit Journey
Loaded Dice
Lost Riches
Mind Meld
Nautilus's Riptide
Pack Your Bags
Platewyrm Egg
Playful Trickster
Possession
Powder Pandemonium
Riptide
Risen Mists
Salvage
Scrapshot
Spirit Journey
Strong-arm
Sunk Cost
The Box
The Harrowing
The Ruination
Thresh's The Box
Treasure Trove
Vengeance
Withering Wail