Giving him no quarter is the most effective way to beat him as he will have his back turned, leaving him open for a few easy hits and allowing him to be staggered rather easily, which means the player can easily staggerlock him to death.
Duke Tseldora was the proprietor of Brightstone Cove and founder of the mining town which once flourished there. He disappeared after the town was suddenly and mysteriously overrun by spiders, and he was never heard from again. Though the circumstances surrounding the Cove's destruction remain unclear, the murky truth behind the Duke's disappearance seems somehow related to his unnatural obsession with spiders.
Dark Quartz Ring +1
Fragrant Branch of Yore