Inside the Tomb of Annihilation

The client asked me to paint an epic scene that occurred in the Tomb of Annihilation.
After Zabuh (Cleric of Ilmater) obtained the Black Opal Crown, he decides to sacrifice his arm to escape from that chamber. Retom (half-orc barbarian) cuts off his arm while Chiriku (Tabaxy monk) watches with tears in his eyes. The new objective now will be to find the soulmonger and destroy it.