imagine two hearthlings roll up to one side of river in a row boat, all alone not far from thier enemys place which is guarded, well one of them (with pearl diver credo) gets a crazy idea
thay flip the boat weight it down and start walking into the water at a very slow speed once thay hit the deep thay dissapper but if anyone on surface is close thay can be spoted and boulders droped on them but thay can slowly sneak around rivers for certain amount of time mabye based on boat q lol
random idea bit crazy but i like it prob not great but i see uses (seidge escape, smuggling, surprize atks)