Sho'guul's lair

The portal to Sho’guul’s lair has a chance to be spawned when first entering the room with an exit hatch.

Sho'guul's portal-spawning mechanic is based on mathematics between Blessings and Curses.
 * Every run the percentage chance to encounter Sho'guul is set to 5% at the start of Goldmine 1. The chance you accumulate carries over floors in a single run.
 * Obtaining curses grants 10% per major curse and 5% per level of minor curse.
 * Obtaining a blessing, whether through the use of Inverter, through Altars, or picking them up from the ground, removes 5%.
 * Blessings granted by the Censer do not count towards this calculation.
 * Removing curses, whether through Penance, the Purge or Purification potions, Talismans, or otherwise does not reduce the chance to encounter Sho'guul.
 * Leaving Sho'guul's floor resets the chance -15%, even if you do not buy anything from him.