In Diablo II Resurrected, Demon's Arch is part of the Balrog Spear category and one of many unique Javelins in D2R. It is a relatively small item, taking 3 Blocks of space if you want to store it in the inventory or stash. Your character needs to reach at least the Required Level of 68 to carry this item. This Balrog Spear has a Strength Requirement of 127 before it can be used. Another limitation is Dexterity, which should be 95 as the very minimum.
This is already the elite version of this Javelin, so it cannot be upgraded any further. The normal version is called Short Spear, while the exceptional version is Simbilan.
Below is a list of variations we can get for you from our network of trusted trade partners: