Have been reading as much as I can find on this topic, still trying for the answer.
Understand Ad Stone gains 1 HP and 1 Mana per 10 adventures completed. Heard, not there yet, that stats and resist get +1 every 50 to max of +10.
I have seen posts showing Ad stones linked and they show the bonuses. I have done 47 adventures, successful 43 (It's not my fault! I swear the tank/necro's pet... just went berzerk...). My stone shows no bonuses. Not a single change if I equip and unequip the stone, even shifting it to bank and back. Have checked to see if it only functions in LDoN. No effects from it at all.
I do have it combined on a charm, and equiped. Would really like to figure out why/if I am not getting what it sounds like I am supposed to be getting...
M.