Yeah It's A +3 Chainsaw Right There
Okay Tut... I was assuming that you and DFoO were working together on the ZOM-G-C. Unfortunately, Zom himself isn't much of a help.
I DUNNOU JUS PUSH BUTTONSALLS I KNOTEH MINDFLAYR BITCHED ALOTHE WAS LIEK "THIS THING SUX DOSENT WORK"HE ONCE HURLED IT AT A WALLBOUNCED OFF AN HIT HIM BACK IN THE HEAD LOLGOOD LUCK BUDDY...
Zom's chainsaw is a +3 Chainsaw that does an extra d12 damage when powered up. So it's basically the best weapon in the party. You want to use it, you gotta kill an 'undestructable' golem. Or just use it indirectly via the controller. Or trade him something of great value.
Rules for the controller that you discern are listed below. It's simple, there's a secret chart, you roll EITHER IQ or WIS, then percentile, and something happens. If you want to make extra controllers, multiple people can use them each round, best roll wins. Counts as your potion free action. It's pretty easy, basically you just post telling me what you want Zom to do, post some blogrolls, and see what happens while you take your normal rounds.
As for weapon upgrading... you gotta take Weaponsmithing first of all as an NWP if you haven't already. Second, since you're not a caster, there's no way to change any weapon's powers. What you can do is basically change one weapon into another, or do grafts. So you could turn the +2 NLS Greyhelm Sword into a +2 NLS Buzzsaw. But adds
don't stack, e.g., taking a +1 weapon and another +1 weapon won't make a +2 weapon. By 'graft' I mean take the Queen's sceptre and make its powers part of your buzzsaw.
Doing much more than this is going to take even more NWPs, better facilities, and collaboration with a spellcaster, demon, or a special book or something.
Tut, if you really want to try extracting the souls from the Greyhelm Sword- a dangerous proposition- give me a Magic Lore check, a Weaponsmithing check, and a straight IQ check. If you don't got the skills, you can sub in IQ. Be careful though... this is serious shit here.