THE DOUBLE KEY FARM: How to Turn One Boss Into Two Here's the shocking part. When you run non-quest Patriarch or Matriarch Halls with high Waystone drop chance, you can get TWO boss keys from a single fight. Stack Waystone drop chance to 90% using Exalted Orbs on a six-mod map, and the RNG starts heavily favoring double drops. Boss keys currently cost around 4 divines for half a key-so doubling...