I imagine that the idea of "collecting" is interesting and best exploited.
I especially should have invested $ 300+ last year to buy the Xmas drach then increased my creatures slot and accumulated creatures, when I went to the section of tokens I realized I was with many creatures, and they should be scattered, so since then I have tried sacrificing creatures before finish the tokens section.
What makes me even now with $ 259. I see that Aniversary Aramor are highly coveted because every year is a different model released. And most creatures have a colored version in shop, maybe other creatures are released in colored version?
Maybe a competition where everyone can participate "customizing" your favorite creature, and most voted to be thrown in shop?
Or completely new creatures, are released on a regular basis and for a limited time ... I am not speaking here of "super" creatures but only colored versions / customized from existing or new ones without "super" skills, but to be collected .