The Magmawyrm’s Scaled Sword is a colossal sword that deals both physical and fire damage. This weapon scales from Faith and Strength making it great for those using Faith based builds. The Scalesword comes equipped with the unique Magma Guillotine ability. This ability allows you to leap forward and slam the weapon down, creating a blast of magma wherever you hit. You can follow this attack with additional inputs to perform hack attacks. How to get the Magma Wyrm’s Scalesword in Elden Ring.
To get this weapon you must travel to Liurnia of the Lakes. This is the area north of Limgrave and you can get there in two ways. The first path is through Stormveil Castle. This path is quite treacherous if you are unprepared or if you are underleveled as you will need to defeat both Margit and Godrick. The easier method is to take the cliff path east of Stormveil that connects to the broken bridge.
Once in Liurnia, make your way to the north end where there is a large gorge. Travel through the bottom of the canyon to find some ruins. This is the ruined Abyss dungeon that connects Liurnia to the Altus Plateau. Go to the end of this dungeon to find Magma Wyrm Makar. This boss is quite deadly and uses the Scalesword during combat. You can summon a few NPCs before the battle to make it easier. Once the boss is defeated, you will be rewarded with the Magma Wyrm’s Scalesword.
https://doublexp.com/guides/how-to-get-the-magma-wyrms-scalesword-in-elden-ring How to get the Scale Sword of the Magma Wyrm in Elden Ring