To get Artix's weapon you must have 10 Undead Slayer Badges and any kind of Shadow Reaper of Doom and then go to Necropolis and talk to Artix and press purify Doom Weapon!!
Train your strength.
it depends on the weapon and stats.
Dragon's Fury IIIWarlic's Region; NytheraQuest Reward
i think you purified doom weapons
With an ICE or WATER weapon.
Yes you do loose it
buying in oaklore weapon shop
Falconreach, Yulgar's weapon shop
You find him in Oaklore. He is beside the weapon shop.
Aeris Battle Spire
You can find it at Valencia Shop but you need items to make the weapon.
Uber wind destruction staff