This new dragon is incredibly powerful, and it is much better than Baneslayer Angel, another mythic 5-mana flyer from Core Set 2021.
Terror of the Peaks could be played across all formats, including commander. Its combo possibilities are huge, and generally, it's just a very strong card no matter how you look at it.
The card's current price is stable and will most likely climb until it reaches one or two top-tier decks. This is a relatively safe purchase at this point, which may actually turn out to be an excellent investment in the long run.