Asteros, Star Forger

Cosmic, Indestructible, Flash (When this card
enters the battlefield, Create a number of star
counters equal to the amount of mana spent to cast this
spell.)
Creatures you control enter the battlefield with a number of +1/+1 counter equal to the ammount of star counters you have, and flash.
When you tap this card, Add {w}{u}{b}{r}{g}, Then if you sacrifice a star counter, you dont lose that mana as steps and phases end.
This cards power is equal to the number of star counters you have.