Many bosses in Lies of P are large, frenzied puppet automatons that rage across the city of Krat, but the Door Guardian represents a mutated human transformed by the Petrification Curse that you have to beat. The hulking form of this enemy wields a massive crystal in one of its hands, along with several powerful lightning attacks. The Door Guardian, thankfully, has some apparent weaknesses that you can target to gain an advantage.

https://screenrant.com/how-to-beat-door-guardian-lies-p/