When and how is the Zombie Star dragon given? I thought it was today that we received it but I don't see it anywhere and I have enough antidotes for it. Any thought or ideas

You have to make a support ticket if you earned 40,000 antidotes and haven’t receives rewards. They will give u an empowered zombie star egg.

if you have at least 50k antidotes, there should be a zombie chest popup when you open the app/game. when you open it, it will give you an egg and 120 orbs to empower her. quest will give you 20 orbs per level, total of 200 to let you empower her to 2 stars.

check your storage to double check your antidotes to make sure you have at least 50k. if you do, check to see if there are any chest there, cause sometimes we close those opening tabs so fast we don't even see our pop up prizes. otherwise, if email support that you didn't get your prize.