Ribcage pieces are obtained as an uncommon drop from Wallasalkis, found in the Waterbirth Island Dungeon. These are used to make skeletal tops by giving Peer the Seer 3 dagannoth hides, 10,000 coins, and 1 ribcage piece.

Dropping monsters

Monster Combat level Quantity Rarity
Wallasalki 98 1 3; Uncommon (1/64)
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