Not only does she grant additional combat phases, she untaps all creatures you control when she attacks not just the ones that attacked
This allows you to spread out your spending and get even more value from your gift card
And they'll be easier to get too, which is pretty great, but damn if there aren't too many of these
Each player rolls a W20, the Chaos Dragon must attack every turn, but cannot declare the person with the highest roll as a target
But when I can stop worrying about that and instead rob my opponents deck, I get to be the backstabbing cat burglar Ive always wanted to be, and if my deck sucks, maybe their deck will be better
Sometimes, you just want the ability to take something off the board, and Stand Up for Yourself will do it