I have never came across an upgrade for a one handed necro weapon. Are there any out there? I am mainly looking for a +1 death mod. If there isn't are there any one handed weapons already with a +1 death mod?
no, its impossible. only axes, bows, staffs, hammers, sword are upgradable. end of question.... however, bartoks energy item gives u +1 deaht, and other greens give +1 blood etc.
Only warrior one handed weapons are upgradable, and they cant get a +1 to death since that can only come from your offhand or a staff. There is a collector's cesta in the jungle that gives +1 death magic, and then there's also Bortak's Cesta, which you might be able to pick up relatively cheap these days.