Since we're gonna get new dungeons, that of course means new loot. What better way to get players in your dungeons than enticing them with stat-increasing potions?
The potions would be rare, but when you drink one it would increase its respective stat by the square root of its quality, rounded down. For instance, if you got a q25 psyche potion, drinking it would increase your psyche by 5. The same would be true of a q35 psyche potion.
However, these potions come with a catch. To consume them, the player must sacrifice experience proportional to the stats gained. For every 1 stat point awarded, the potion would cost 250 experience. Our q25 psyche potion would then cost 1,250 experience.