(Or you could call it something different... Stitching pets together sounds a little macabre, but you know what I mean)
The Spiral has so many amazing and interesting pet appearances, but many wizards do not feel free to enjoy them because the cards and talents these pets give aren't aren't always useful.
I would love there to be a way to have the talents of one pet, with the appearance of another!
There is nothing but upside here! It would add a whole new dimension to pet creation without actually changing anything that would upset how pets function in combat. Also think of the crowns people would spend on this!