I'd like to add the "Quickdraw" quality (feat, in fact) to a (magic) weapon. Is it possible ? What spells would be involved in the making of such a magic weapon ? What would be its enhancement bonus ?
Well weapons usually work only when wielded, making it slightly unusual but otherwise mighty cleaving grants a feat equivalent to a specific weapon at a +1 bonus.. that seems about right I guess.
Its the magic item compendium I think. In regards to your of final question. Adding feats via items tends to be rare. But if you really want to do that make a magic quick draw sheath.