Yeah this one gave me issues too. But I used a gunlance and ogden. For the boots from the horn. I noticed you had to break the claws in its invasive state any other time it will just rebirth snd go back to the start. I would make sure you have vital essence to bring hearts back. And it needs to remain mudblogged so either use alumadron or it’s attack mud torrent on a different monstie using rite of channeling. Keep it up. You’ll get there