Complex sentence: He wields a battleaxe imbued with powerful rune magic, having gained this weapon during his first excursion into the northern Chaos Wastes, where he recovered it from the dead son of King Thangrim Firebeard.
Split into simpler sentences: He wields a battleaxe imbued with powerful rune magic. Having gained this weapon during his first excursion into the northern Chaos Wastes, where he recovered it from the dead son of King Thangrim Firebeard.