Demolisher

This mighty sledge yearns to wreak havoc.
Overview
Demolisher is a two-handed blunt weapon in Valheim designed for heavy area-of-effect combat. Its primary attack slams the ground, dealing damage in an area and knocking enemies backward, making it especially effective for controlling groups rather than focusing on a single target. It has no alternate attack.
Demolisher is crafted from 
Because its attack is an impact on the ground rather than a direct swing, Demolisher excels when enemies are clustered, when fighting in tight spaces, or when extra crowd control is more important than precision. The knockback also helps create breathing room against aggressive melee enemies. Its lack of an alternate attack keeps its use straightforward: positioning and timing matter more than move variety.
A notable visual detail is that the weapon’s head appears to be made from black marble with copper accents, including Yggdrasil-like designs on the sides, but these materials are not actually part of its crafting recipe.
Official description
This mighty sledge yearns to wreak havoc.