The Fantastic Seal is one of the many monster drops that can be acquired in the Frontier. They are typically acquired from the Yellowmen.
In appearance, the Fantastic Seal resembles a hexagonal seal made out of wood and gold, engraved with fantastic markings.
Like most monster drops, it is typically sold to selling vendors in sanctuaries. It does not have a relevant purpose in-game, with the exception being turned in in exchange for a reward while doing Slayer's Tasks.
- The engraving seen on the seal is a possible foreshadowing of Mr.58.