Originally posted by Complaintdesk:

Yagluth is resistant to slash & pierce damage

He's only resistant to piercing, not slashing, according to Valheim Fandom wiki...? Basically, Yagluth is a skeleton, so he's resistant to piercing, though he is not weaker to blunt than most of the other damage types.

Frostner is an essential weapon so if you're not interested in mining stupid amounts of silver for the sword that has a better variant available in each of the following biomes, go with that. You also won't need blackmetal sword for anything. A tower shield would work best since you can't parry the boss, but there's hardly any need to make one specifically for that fight if you already have black metal shield.