Beyblade burst battle zero MISSING DRIVER

Question regarding the game, Beyblade burst battle zero.

I have unlock the Awakened Variable(2) Driver recently and was wondering how to unlock the final Variable(3) Driver.

Anyone knows to unlock the last Variable(3), and which Variable(?) Driver should i used to unlock it?

Use Variable(1) furthermore or the Awakened Variable(2)?

Help appreciated and thanks.