Akoden, Eagle Trainer

Eminence - At the beginning of your end step, if Akoden, Eagle Trainer is in the command zone or on the battlefield, if you control a Bird or Griffin, you may pay {2}{g}{w}, if you do, create a 2/2 white Bird creature token with flying.
When Akoden enters the battlefield, create a 2/2 white Bird creature token with flying.
Bird and Griffin creatures you control get +1/+1.