Efaunt Ribcage is a Legends of Idleon item: recipe.

Efaunt Ribcage | Idleon Toolbox

Efaunt_Ribcage

A piece of Efaunt's tunic. I guess it must have gotten torn off while you were absolutely obliterating them with big time Damage.

Ripped_Tunic

Increases Weapon Power by 5. 2% chance to be consumed every time you defeat a monster. Must be equipped in a Food Slot to give its bonus.

Midnight_Cookie

The full filtration process also involves filtering the diamonds through a vat of diamonds before using those filtered diamonds to filter the water! If only they'd filter their filtration process through diamonds so this item description wouldn't be so long.