So have you unlocked the Primal Instinct slot? Amazing, Zoobster!

This means that from now on you will be eligible to get the Primal Instinct from Crates. If you still have not unlocked the Primal Instinct slot and want to know how to do it, tap here!

The only Crates and Toolboxes you will be able to find the Primal Instinct are listed below and you find your chances on each right beside them.  

Emerald Crate: 25%
Emerald Toolbox: 35%
Legendary Crate: 60%
Legendary Toolbox: 70%

If you want to check a list of all Primal Instincts, you can check them on each character article here.