>>20734767This. Also note how it retains its ice typing when spliced, which further goes to show how the current fusions are more forcefully latched on than truly integrated.
imo, Kyurem-BW as an imperfect amalgam of the three would get a further 80 BST - +40 for each dragon bonding with each other, so 780 BST, and through primal reversion truly integrate Resh and Zek to become the original dragon and embodiment of Tao, which I guess would be another 120 BST (I assume PR will net more BST than ME, seeing as a. 100 is the Mew-tier stat standard while 120 is Arceus-level; b. 100 BST is a bit diluted in effect once you approach 700 BST; c. will bring Primal Rayquaza a nice benchmark 800 BST), echoing the stat gain from combining all 3, hence 900 BST, and also lose its Ice typing. Which btw won't be broken in ubers as long as it can't hold items and Xerneas is a thing.