Archaic: Size
Crystalline : Atk Spd
Superheated: Spread between Intensity + Power
Frozen: Defense
Sandy: Intensity
Drowned: Spread between Defense + Size
Blasted: Power
Bonus tip(s):
Lost cargos count as underwater chest
You can get drowned modifier from last spot of legendary charts (idk why to be specific it was a cernunno chart, maybe a bug or something)
The only modifiers that can be applied to sunken are drowned and atlantean
Every other modifiers currently only exist on basic items since they can only be obtained from treasure charts.