Crook

A Crook is an item introduced by the Ex Nihilo mod with the primary purpose of increasing Sapling yield when used on Leaves.

Usage
Mining Leaves increases Sapling drops. Mining Infested Leaves increases String drops. Mining either has a chance to drop Silkworms as well.

Right-clicking a passive mob pulls the mob towards the Player. Right-clicking a hostile mob knocks it back (without injuring it).