Giant Mimic - The RuneScape Wiki

The Giant Mimic is a larger, boss version of the Mimic pet. It is located in Alice's Treasure Chamber. A mimic kill token (or its untradable variant) is needed to fight the mimic. The token may be used to teleport to the chamber. You cannot teleport while in combat or when a familiar is summoned.

So I got the mimic pet : r/runescape

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