In the article 'An item that decides the fate of two NPCs!' by Hritwik Raj, the importance of the Elden Ring Iris of Grace and Iris of Occultation is highlighted. These key items play a crucial role in determining the rewards you receive from NPC Jolan and Fire Knight Queelign at the end of their questlines. The guide provides detailed locations for finding the Iris of Grace and Iris of Occultation in the Shadow of the Erdtree DLC, as well as the NPC choices associated with them. Players must decide between obtaining the Spirit Ash of Fire Knight Queenlign and Jolan by using the Iris of Grace, or receiving their weapons by using the Iris of Occultation. Ultimately, the choice between these items depends on individual gameplay preferences and needs.