Theoretically you could be proliferating the counters so Arwen actually sticks around and is reusable, but it's so much worth for so little payoff
This includes any of the commons, uncommons, rares, or mythic rares mentioned above, including borderless versions
Be aware that your play group can choose to override this limitation if it chooses
This five drop 5/5 on curve Naya colored dork gets bigger as more Auras are added in size, and that's card disadvantage if you kill it, but not without jumping through some targeted restrictions first, and you can Edict them, but they'll sac another dork, or Damnation the board, but respond with Heroic Intervention or just give it an indestructible Aura
Meanwhile, Janet went about her business