A vial of blood is made by using a vial on one of the fountains of blood at the southern end of the palace in New Varrock. It's used to draw a blood circle around Delrith and banish him back to Infernus, in order to proceed with Dimension of Disaster: Demon Slayer.
| A subquest of Dimension of Disaster | |
| NPCs | |
| Enemies |
 Agrith Naar Delrith |
| Items |
 Sir Prysin's key Spirit measure Dog hair Sobriety potion Sobriety potion in a beer glass Black hood Black robe top Black robe bottom Vial of blood Black mushroom Silverlight (Dyed) Darklight |
| Rewards |
 Magic XP lamp Crafting XP lamp |
| Locations |
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| Miscellaneous | Quick guide • Transcript |
