yup, i agree, its based on luck. got my left heart on my first try using red and blue combination. after that got the right heart on my first try using the same combination. got passion dragon on my second try by breeding left heart and right heart. :)

I got the Passion dragon on the 3rd try of breading RightHeart (parents were Fire w/ Water) with LeftHeart dragon (parents were Water w/ Fire).

btw,  can select Passion dragon in the breeding dragon list. I haven't tried to breed it though, since I still need choclate.

We CAN select Passion dragon in the breeding dragon list, even in the Valentine's Day update. (I took a screenshot for that)

(btw, I hatched a laserlight from the breeding I mentioned yesterday between passion and love)

Just tried the same combo again and got 15 hours.

It's true that passion acts as a mirror. (I'm using that to try to get virtue, but so far there's none)

would then Passion and Diamond give Diamond? Have to try that as soon as I have my chocolate :)

Yes, it can. I did Diamond/Passion many times and so did other people it gave Passion or Diamond, most common outcome was Passion.  (of course I was one of the ones that only got Passion from the combo >_<)

Both of you must be on Android ? and that is why it is showing up in the Valentine's addition but it doesn't change the fact that it's a bug.

Yes it does act like a mirror. Myself, King, a few neighbors, and many people on the TL forum tried breeding with Passion and this has been the conclusion. It either gives Passion or a Dragon containing colors from only the other dragon. Passion gives nothing to the combo.

/me sees lots of diamonds rolling out :)

??????lol XD

If I can ever breed a Passion I'll have to try that myself.  Still though you are trying to breed an Ultra Rare vs. a Super Rare, so I imagine you'll get Passion a whole lot more times than you would get Diamond.  (So far 12 failed breeding attemps)