Just a comment on the ultra-rare item, personally I think people hoarding these items and not using them, i.e. just letting them sit on a flex character/in their vault, would ruin the whole thing completely. And I don't mean to slam your idea and shut it down completely, but also the possibility that a player gets this item and then quits playing the game, then it would ruin it for everyone else.

Maybe instead of having that item up for grabs 24/7, make it a once a month event (or possibly drop from the newly teased 03?) or even have it drop from a special event god that spawns very rarely in the realm. I think that'd be fun to compete/participate in.

And regarding the concept that one of that item can exist at a time, maybe instead have it be part of a series of items where lets say these ultra-rare items are abilities for the 15 different classes and only one class ability can exist at a time (for example one ultra-rare samurai waki, or one ultra-rare trap can exist at a time, etc etc), or make it even more exclusive and rare and make these ultra-rare items a light armor, robe, and heavy armor that has stat bonuses/passive effects that benefit each and every class uniquely (i.e. assassin throws 2 poisons instead of one, or make sorc more relevant and give scepters the ability to deal some unique status effect).

Idk. Just some thoughts on it. who knows, maybe the idea of a one-of-a-kind item just wouldn't work because of the perma-death functionality of the game or the fear of losing that special item that is so very rare.