spirit orbs, noob.
i believe if you have 100 undead essences, you can merge them into a spirit orb. i think you can merge them into something else, but the tuth is, i forgot. the only thing i know are spirit orbs.
no
to get the undead pirate curse armour u need to have another undead armour
undead war
yes you can, you have to do the quest hall to the king then you can buy it at shadowfall.
You cannot get the Undead Warrior without ACs, sadly.
Defeat the Undead Fire Mages until you get the Fire Gem.
To obtain the Undead Commander's Sword, you must keep fighting the Undead Giant until you manage to acquire the sword.
Go get a life!
Chaos merge shop.
hump the artix
Go /join lionfangwar and there is gravelyn then press on her "!" then there is a slot for "Become Undead" then press it. Hope it works :D