I've finished all the free levels on Grub Guardian! It took me a bit to figure it out but it's sure a fun distraction when I have time.
Levels after Celestia are locked and you have to unlock them with crowns which would be fine IF I had any! I usually spend them all on mega-snacks and the new wands.
Upgrades to Medusa helped a lot!
Success! Let me know if you've beat this level and how you did it. What score did you get? What mixture of guardians?
I'm totally stoked because I just crafted my Avalon level gear. I had been packing the recipes around for a while and didn't even realize that I had them pretty much done. I just needed a quick trip to Celestia to pick up the "Perfect Peridot" and "Perfect Saphire" and now I have crazy good defense against storm and fire. If you are going to arena you really need your crafted gear.