New mob... the Boner

The boner is a mob that mostly can be found in sunflower fields.it is a super rare mob. it can be tamed by giving him 1 sunflower. when tamed, it will bonemeal every block it walks on if you set it on. Also, if it finds some crops, it will bonemeal them until 1. his bonemeal tank is empty (needs to be refilled with 5 bonemeal if tank is empty) 2. the crops grow to their full size.  This mob would be totally green, with a glass tank on its back. the glass tank would have bonemeal in it and if it bonemeal, some bonemeal would disappear. the tank would be holded by some bones. This mob would be a super addition to automatic crop farms.