Guild Wars 2

Spear could be a hybrid weapon between water and land. Think about it, it wouldnt take as much time as making a whole new weapon cause they already got skins for it, all they would have to do it make new skills for above ground.

Ranger- It could be kinda like a thrown weapon almost like a javelin.

Guardian- Ranged thrown weapon with some CC. like the 5 is a knock back and the 3 is a blind or something.

Warrior- A medium range melee damage doing weapon.

Mesmer- Couldn’t think of much on this one but i’m sure Anet could.

Thief- Melee weapon based around vulnerability, so that they could use the spear to stack some vulnerability then pull out another weapon and burst.

Necromancer- Maybe a direct damage doing weapon, or just a bleed and poison condition stacker.

I think it’d be a cool new piece of permanent content added to the game, and the things i listed above could be changed too those are just ideas i thought of over 10 minutes. If anet put even a week of thought into the abilities i’m sure they could do it nicely.