Sepulchral Wyrms are demons found in the Obsidian Halls under Wusao Mountain. They appear only in pairs alongside groups of magma sprites.
Sepulchral Wyrms have a lot of health and use two types of attack, basic melee and a fire breath that deals almost no direct fire damage but instead an extreme amount of burning damage and will easily kill a player with low fire resistances. They rarely use their melee attack, preferring to almost constantly spam their fire breath.
Recommended resistances: Fire (you will die if you try to fight them with low fire resistance, it is recommended to get at least 70%, especially consider the fact that you fight them in pairs).
They can drop the valuable Demon's Blood charm.
The Obsidian Halls