Spring Rabbit's Foot

Spring Rabbit's Foot is an item that summons Spring Rabbit, a rabbit companion.

Source
This item can be found in Brightly Colored Eggs that appear in the starting areas during Noblegarden.

This item is also sold by Noblegarden Merchants and Noblegarden Vendors during Noblegarden for.

Trivia
If two or more Spring Rabbits are near each-other they will occasionally "fall in love," shooting a tiny egg out that hatches into a Baby Bunny.