Duskblades of 13th level or higher gain the ability to channel a touch-range spell they know into their weapon, and make a full attack with it. However, they know very few touch-range spells!
The duskblade spell list has many cool rays though, like disintegrate, or targeted spells like slashing dispel. I would like to be able to channel these spells into my weapon, and stab many enemies with them as part of a full attack.
The method needs to be achievable for a character whose first 13 levels are in duskblade. I already know about enlightened fist's Hold Ray, but I am hoping there is an option that doesn't lock in all 20 of my levels.
I'm open to Dragon Magazine and perhaps even 3rd party sources, but Pathfinder is off the table.