Large and incharge Hero units storm around the country side in SynergiesMOD
These will spawn along side (instead of) elite monster spawncalls. They are noticably larger and will take random affixes from Derinkuyu for added beefiness!
They have a slight inflation on base damage and health over elite monsters and are worth double their xp for their rareness.
Also they have a chance to Drop the new Darknessfalls Stones, which can be turned in as a currency towards crafting ingredients.
