EXP nerfs in the current KMST Patch.

You know what would be a trully hard boss? A monster akin to Geist Balrog, with enough physical damage to 1HKo you, with just 100m HP, jumping and/or teleporting all around the map. With only 30 mins to defeat it you would struggle between dodging the damn thing and getting an opening to attack/buff, requiring true control of your character and not of your wallet.

So, I guess a flightless Vellum?

Also, doesn't those cubes drop from bosses and are untradable? Also, they can't go to Legendary.