zeldaroth.fr

i know when to spell it when final boss is having like 20% of a life and Your all remaining hearts turned blue, there will be some message about fight not ended and then change weapon will be blocked, boss wil not loose life from sword, only thing to do is to use it. I have a problem with that spell ...

hello
is yellow sword needed to kill final boss?
I'm asking cause can't find 15 gems to access fairy temple.

thanks in advance for any help
btw this game is awsome!