Just got myself a Nebradisk, was a lot simpler than I expected tbh, just had to take my Meteor Volcano Dragon away from the monored and exchange him for my Golden Keeper and all was well.
The most dangerous part was when I got to wave 5 and almost killed the wicked lady and she bound my entire team (besides my echidna, who I had already popped), two bloody nails later and I barely managed to get enough healing out to survive a third bloody nail.
Nebradisk was easy, just make sure I had enough red orbs (easy with both Gigas and Ares at my back) and once he would make me explode just pop Golden Keeper, mission accomplished.
That's step one to acquiring Folklore, now to wait for the next mystic dragon.
As far as the PEM goes, I got another angelit, a cupid, a keeper of dark (which is good because I dropped only keepers of light on tuesday for the Heras), a Blue Fruit and 2 plus eggs.