Valki is the only new God creature from Kaldheim that garners universal acclaim throughout all formats.
First of all, it's very cheap and has a powerful effect. Second, it can be used in both combo decks or serve as a commander. Lastly, it has a very strong flip side represented by the new Tibalt planeswalker, albeit a bit too expensive at 7 Mana.
All this wraps up nicely into one of the most surefire investments in Kaldheim. The good indication of this is the initial market price that has been trumped since its reveal. Could it be the beginning of the steady rise? It looks very much like it.