well lets see , i have spent the gold twice now trying to get ice hound from myth and ice mix - guess i am doing something wrong because BOTH times i got the parent back- NO new pet at this point i am discouraged with orthus(sp?) and stormzilla, i have a herd of zilla running aound cause that is all i seem hatch with those, i have a few ice colossus now, and now myth hound 3 (the original school pet)
obviously this is VERY random whether or not you will get something different, i have with one zilla hatching and one colossus only that gave a different pet
lol i not counting my ice elves and spectres, have a few of those too now lol
my satyr mixed with a wraith and i for the dead tree, but the next try with lady blackhope got us each our parent
i will train up my own wraith and mix , hopefully, with my ice colossus for frost wraith ( 1 have 2 accounts) i mix my accounts or match up with a friend for hatchings
right now, all mine are broke, so we go back to the streets of ds and pick some fights - the rewards are fast and good, fastre than boss fighting and we always get decent gold, and either an item to sell or snacks