Stigma system finally works!!!
Just get the quest by visiting Altgard/Verteron at lvl20, report to Pandaemonium/Sanctum and stigma will be available!
More updates:
*Removed some monsters from Altgard
*Corrected pool and spawn time of Treasure Box
*More retail-like summon stats
*Added skill attack drain effect (Curse of Incurability, Draining Blow, Righteous Punishment, Ancestral Righteous Punishment, Punishment of Darkness)