Lysis makes using 3 bone fragments. She sells them for 375 gold and buys them for 81 gold. It also drops from the Master Alchemist that is furthest into the Orc Cave. A drinking skill of level 20 is required to drink this potion successfully with no chance of puking or gagging.
This potion makes your skin lighter and increases defense by 17 points, 8 more defense points than the orc skin potion and 2 less defense points than the stone skin potion. However, it does not slow the player's movement like the stone skin potion.