My problem with fantasia potions is that if they were any sort of common in the game world then changing your.. well, everything would be something we saw happen all the time. So far it's completely absent from the lore aside from the fact that you can acquire it, use it, and it has flavor text. There is nothing in the world culture that reflects its availability, and this is problematic for me.
Personally I prefer to ignore them totally, but we all know we are going to inevitably run into people who insist on using them in character (and worse, they will treat them as if they are common and that it's no big deal). In that case I just process it as Rakka'li would process someone telling him that they were Menphina, that is he'd think they were full of it.
I'm not against using them alongside a name change to change your character into a different one entirely so that you can roleplay something else by the way.
Personally I prefer to ignore them totally, but we all know we are going to inevitably run into people who insist on using them in character (and worse, they will treat them as if they are common and that it's no big deal). In that case I just process it as Rakka'li would process someone telling him that they were Menphina, that is he'd think they were full of it.
I'm not against using them alongside a name change to change your character into a different one entirely so that you can roleplay something else by the way.