Hello, I noticed when using the gadgets, you can go around the Mining Fatigue debuff the Elder Guardians give you, instantly winning the Ocean Monument boss battle. What you do is you can burrow through the top and freeze the boss in ice, and it just dies. Don't need air, depth strider, speed potions, navigating the maze, fighting guardians on the outside etc. I haven't tested but there might be a similar problem with the deletion gadget and exchange (create holes). What might work is for the Mining Fatigue to affect the gadget, and/or making certain functions not work in the vicinity of / on Ocean Monuments which still have Elder Guardians (not cleared temples).

You could make the gadgets require temple loot but then it would be requiring the battle which is not very good.