As an expert, I understand your concern about obtaining Festering Desire’s refinement materials after the event. Unfortunately, as of now, there is no way to acquire Festering Desire’s refinement materials once the event has ended. This means that if you missed out on obtaining enough materials to fully refine the weapon during the event period, you won’t have another chance to obtain them in the future.
The Festering Dragon Marrow is a unique refinement material specifically designed for Festering Desire. It cannot be obtained through normal gameplay or other activities in the game. This limited availability of the refinement material adds a sense of exclusivity to the weapon, as it can only be fully upgraded during the event.
It is important to note that Festering Desire is an event-exclusive weapon, and similar to other event weapons, it may not return in future events. This makes it crucial to take advantage of the opportunity to obtain and refine the weapon during the event period.
If you were unable to obtain enough refinement materials during the event, it is unfortunate that you won’t have another chance to fully upgrade Festering Desire. However, Genshin Impact regularly introduces new weapons and events, so there will always be other opportunities to acquire and refine other powerful weapons in the future.
Festering Desire’s refinement materials cannot be obtained after the event ends. It is essential to make the most of the event period to collect enough materials to fully refine the weapon. If you missed out on obtaining the materials, it is unfortunate, but there will always be future opportunities to acquire and refine other powerful weapons in the game.