I encountered 2 bugs that I found.
On Silver Dragon, I had an upgraded version. It says it is a tribute 1. I was able to play it even with no summons available.
On Dragon Infernos, I also had an upgraded version. I chose Blaze every time because I think your burning mechanics are awesome. What happened was instead of filling up the orbs, it would delete all but one empty orb which would be the Blaze orb. I had the Insterter artifact that was adding orb slots, and the card would still delete the empty slots while leaving one more blaze orb. I am not sure the burning was working right either on those orbs because it was adding anywhere from tons of burning even when I was just tributing 1 summon. Occasionally during that run I would have other orbs. When I did, the card did nothing. I don't know if it supposed to do nothing in that specific case, but what I was expecting was for it to channel enough blazes to fill up my orb slots, not do nothing.
Thanks for making this mod so far I am having a lot of fun! I hope my findings help.