The Ozolith would make a great addition to shift around +1/+1 counters if a creature with them is removed from the battlefield
However, one of the cards had to be quietly changed shortly after it was announced, as players noticed it contained an unfortunate (and presumably unintentional) homophobic slur
Once it leaves the battlefield, it forgets the choices you made
Then, shuffle those Energy cards into your deck
Its also two creatures for one, so it already comes with its sacrifice fodder
We have a bunch of ideas on that front and youre going to see several experiments in that vein over the course of the next years. Mangara, the Diplomat from Core Set 2021 is the first card to be released in this experiment, but there are other experiments coming up, Robins continued