I kinda figure the impermanence could be a pro or a con.
[Depending on who wins. Not that Nobu questions whether the victor would be Chrollo or not. But even then, it's possible Hisoka would only be more determined if he lost and was given another chance. In this world, he has infinite time to strengthen himself, after all...]
So I wouldn't count it as less concerning. Not really.
[Especially when it comes to Hisoka. He so loves to do what's unexpected...]
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[Depending on who wins. Not that Nobu questions whether the victor would be Chrollo or not. But even then, it's possible Hisoka would only be more determined if he lost and was given another chance. In this world, he has infinite time to strengthen himself, after all...]
So I wouldn't count it as less concerning. Not really.
[Especially when it comes to Hisoka. He so loves to do what's unexpected...]
Anyway, what happens then?