Wizard of the Ages

When Wizard of the Ages enters the battlefield,
you may conjure a card named Servant of the
Gods that is 3/4, has flying, and is a
shapeshifter. If you do, you lose 6 life and put a
commitment counter on Wizard of the Ages. It
gains 'At the beginning of your upkeep, put a
commitment counter on Wizard of the Ages.'
Other creatures you control get -1/-1 for each
commitment counter on Wizard of the Ages.