Great Spook

The Great Spook is an annual event.
=== Mechanics ===
Each Great Spook takes place in real-life October and lasts for about two weeks, with the exact start time varying. During Great Spooks, the amount of Spooky Festivals are increased and several Great Spook-exclusive NPCs and mobs spawn.
=== Tyashoi The Alchemist ===
During the event, Tyashoi the Alchemist appears. Players who are at least Combat 10 and have 10 hours of playtime can participate on his questline to obtain various Great Spook-related items and the Eerie Pet. For full details on how to solve the quests, click here.
=== Primal Fears ===
During the Great Spook, killing a mob has a small chance to spawn Primal Fears. Once killed, they spawn a Manifestation, which, in order to be killed, a player must perform a specific action depending on the Manifestation spawned. once killed, they drop Dark Candy.
=== Vargul the Unearthed ===
Vargul the Unearthed appears behind the Hub Mountain during the Great Spook. Players can donate Dark Candy obtained from killing Primal Fears to get various rewards.