Greed Island arcEdit
He is in the group of 21 Nen users including Gon and Killua hired by Battera to complete the game. In Chapter 158, a black dot can be seen next to Doster's name from Gon's Book, which means he either is dead or has left the game.
Abilities & Powers Edit
Due to being able to access Greed Island, Doster is capable of utilizing Nen.