Per the recent press release, version 1.1.1 brings:
Elemental Dungeons: Every Monday through Saturday, players can participate in daily dungeons, where they will encounter and defeat monsters of different strengths and elements such as fire, ice, poison, and lightning, in order to receive Evolve Stones.
Item Evolution System: Using these newly introduced Evolve Stones, players can evolve their maximum-enhanced Epic and Legendary items for the chance to increase their items' Gear Scores.
Equipment Salvage System: In addition to having an Evolve option, Epic and Legendary items now have a Salvage function through which players can acquire crafting materials, Evolve Stones, and Evolution Catalyst (an item that increases the chance of a successful evolution).
Expert Mode: After clearing all 15 stages in the Fallen Iron Castle map in Hard Mode, players can attempt to clear stages in Expert Mode, beginning in the Archen Forest map. The Expert Mode will bring challenges such as increased HP, Attack, and number of monsters.
We had an opportunity to formally look at Darkness Reborn last year and enjoyed it quite a bit. It's available for free (with available in-app purchases) on the App Store now.