Zufrien, Praetor Incarnate

double strike, haste
When Zufrien, Praetor Incarnate enters the battlefield, put X 1/1 white and blue Mage creature token onto the battlefield.
{r/w}{u/r}{w/u}: Concoct. (To Concoct, your opponents may pay any amount of {2}. For each {2} paid, you and the player that paid the {2} put a 1/1 white and blue mage creature token onto the battlefield.)