×

I can use it for keys and net health at 5n1w. But nothing more, feels like that's not right unless there is no accessory chain. But that feels unlkikely as I see areas requiring pickaxe/wall walking and grappling hook and flippers elsewhere...

I thought it was for 9n6e, but you just walk into another door.

I also tried 11N, but unless I'm missing a load of atk gain I think I'll need a hand bomb first.

×This is the correct use. And no, there is no handbomb.
Edit: This is wrong.

×Wow, in that case I am going to need to find a lot of attack gems. I didn't think there were enough to push above that snakes defence by enough to kill it.

Which means I think I am missing how to get to a different accessory? The only crumbly wall I could see required flippers to get at though.

×Looking at high scores for Castle it does not seem you get enough attack to fight the Serpent normally. There are accessories that can get past it.

×Technically there is a Hand Bomb in Castle but the accessory that you trade for it, Invisibility Potion, also bypasses the Serpent. So Hand Bomb can be skipped in the chain.

×Hidden room behind walls, 5N 4W