Zombie head
Mysterious gift offering was removed from RuneScape after an update, but still exists in-game for those who had obtained it.
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Mysterious gift offering detail

Mysterious gift offering was a reward from the Aiding the Exile time-limited event.

Offering one by clicking it for reputation granted 4,000 reputation to the district that the player was aligned to at the time. They could also be handed in to the faction leaders directly to gain reputation with the corresponding faction.