Well it's been a while since I played and got them. But in order to charge the weapons up you need the creats, sigil, and weapon (which you have) take them to the secret path of Macalania woods to this giant glowy sphere kind of thing, and talk to it. Also you need to have the celestrial mirrior to charge them, which you get at the hidden temple, at the Calm Lands, by winning the chocobo race.

Hope this helps.