How does eye of thylacine works? (spoilers maybe)

I found an artifact with the eye of thylacine trait. It will combine all hounds into 1 creature and will take 35% stats and their base traits from each hound. It will also be immune from debuffs that prevent it from acting. I have managed to breed the other 5 hounds and the creature i put the artifact seems to count as 1 hound as well.

Now the question is since artifact traits supposedly doesn’t combine, what should i be putting for the other hounds. Are there traits that simply add stats? Would those even work? Are there other ways to gain some benefits out of it?

Any information and suggestions would be helpful. I need more information on how it actually works.

P.S. Anyone who knows how to breed a terror hound can pm me its receipe.