This ring operates exactly like a ring of feather falling. However, it also makes the wearer clumsy. She takes a –4 penalty to Dexterity and has a 20% chance of spell failure when trying to cast any arcane spell that has a somatic component. (This chance of spell failure stacks with other arcane spell failure chances.) Aura : Strong transmutation Caster Level : CL15th Prerequisites : Forge Ring, Feather Fall, Bestow Curse Price : 500 gp.