Thank you so much again for the feedback and the really cool concept!
I really like the idea of the "Ascended Llama" and its team-boosting ability. I will think about adding a card like that to the game!
However, I probably won't tie it to a "complete all 206 achievements" milestone. Since I am constantly working on the game and adding new content, there will definitely be a lot more achievements coming in future updates, so 206 won't be the final cap for long!
Thanks again for the creative suggestion, and keep those great ideas coming! :)