* in the [[Skull Cavern]] from slain [[Mummy|Mummies]] (0.2% chance), slain [[Serpent]]s (0.2% chance), slain [[Slimes|Purple Slimes]] (0.125% chance)<ref name="purplesludge" />, or [[Skull Cavern#Treasure Rooms|treasure rooms]] (≈0.15% chance for 5 to 20 seeds). | * in the [[Skull Cavern]] from slain [[Mummy|Mummies]] (0.2% chance), slain [[Serpent]]s (0.2% chance), slain [[Slimes|Purple Slimes]] (0.125% chance)<ref name="purplesludge" />, or [[Skull Cavern#Treasure Rooms|treasure rooms]] (≈0.15% chance for 5 to 20 seeds). |