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Mossy key detail

A mossy key grants players access to Bryophyta's lair in the moss giant section of the Varrock Sewers.

It is consumed when used to unlock the gate, allowing one fight with Bryophyta per key. It is possible to hold more than one mossy key at once.

Dropping monsters

Monster Combat level Quantity Rarity
Bryophyta 128 1 3; Uncommon (1/16)
Moss giant 42; 48 1 4; Rare (1/150)[1]
  1. Drop rate is increased to 1/75 if the player is assigned moss giants as a slayer assignment.