You could look at the cheap shops e.g. Poundland, for larger scale toys, even robots.
These things often come with separate weapons. They are easily cut/modified and
could provide, not only god-like bladed weapons, but 'thunderbolts' or similar.
Worth a look at any source of (no longer wanted) toys:-
Car booters; own or other peoples children's toy boxes; Charity shops; Free-cycle etc.