That combo has 27 possible dragons:
Magic...20 hours
Dino...12 hours
Rainbow...14 hours
Tropic...11 hours
Diamond...44 hours
Holly...8 hours
Landworm...6 hours
Life...3 hours
Wild...6 hours
Eagle...14 hours
Firestorm...12 hours
Honeybee...10 hours
Scorpion...13 hours
Athletic...11 hours
Cornucopia...8 hours
Fairy...8 hours
Fruitiful...10 hours
Parakeet...5 hours
Atlantis...15 hours
Island...20 hours
Serpent...16 hours
Hanukkah...15 hours
Mindvolt...22 hours
Mist...14 hours
Social...21 hours
Reindeer...16 hours (not everyone can breed this one, not sure who can)
Mirage...11 hours
And that is it...hope that helps.
What could hatch from virtue+magic=17 hours?
Well this is what I got. Anyone know what dragon this is?
Gemstone/Hunter = 12 hrs
Was looking for Jade, could be just another common dragon.