Get the ember upgrade in the depths next to the butcher. Take it to the normal blacksmith. You can now get your Weapon to +10. Find the blacksmith in Anor Londo, use the modify weapon option and use Sifs soul.
#5Gunkeeper2006(Topic Creator)Posted 10/22/2011 10:40:23 AM
yea i have a bunch of embers i have already givin him. do i have to unequip it or something?
#6HajimeNoIppoPosted 10/22/2011 10:44:17 AM
Nah you just reinforce your weapon and when it gets to a certain point, you modify it.
#7heavyacademicPosted 10/22/2011 10:44:25 AM
You can craft Boss soul-weapons only in Anor londo at the Giant Blacksmith