About golden dandelion and more potions

Potions made from golden dandelion can grant saturation, just like suspicious stew. They can be converted into potion of hunger with a fermented spider eye, and can also have their duration extended or potency increased using redstone dust and glowstone dust.
Potion of slow falling made from phantom membrane can be converted into potion of levitation with a fermented spider eye (applies the same levitation effect as shulker bullets).
Potion of fire resistance made from magma cream can be converted into potion of cold resistance with a fermented spider eye (prevents slowdown and freezing in powder snow).
Potion of water breathing made from pufferfish can be converted into potion of suffocation with a fermented spider eye (depletes oxygen rapidly and reduces oxygen regeneration when above water).
Potion of jump boost made from rabbit's foot can be converted into potion of heaviness instead of potion of slowness (reduces jump height, causes fall damage from shorter heights, and makes it harder to surface in water).
I previously thought there should be an ocean variant of skeleton: no ranged weapons, cannot swim, only walks on the seafloor, but its attacks apply the heaviness effect.
I may make translation mistakes because I don't know English.