I started trying for Opal Octopus again with LVL 15 Crystal Unicorn & LVL 15 Sapphire Sphinx during our WE & got a 45hr timer after several frostfangs. Looks like I got a Sapphire Cthulhu which I don't have, or another Crystal Unicorn. Either way I'm not complaining.
Yay! After weeks of trying and uncountable Frostfangs! Finally bred a 40-hour timer with Sapphire Cthulhu
I got a 50 hr timer after a lot of frostfangs. I think it's Sapphire Sphinx
I have tried about 20 times with crystal unicorn and frostfang but I am only getting frostfangs. That's a 4 hour breeding so I don't get to go to the mine everytime .
Unfortunately I don't have a lot of gem animals to try other combinations.