After defeating all monsters inside Scaling Normal Dungeon a new mini-boss like monster will appear. This monster has a Sentinel rank.
Sentinels are powerful, but if you defeat them they are rewarding you with a good loot.
After defeating a Sentinel don't forget to open Sentinel's Chest which appears nearby, after the Sentinel has been defeated.
Sentinels ALWAYS drop 
Key of Prowess. So don't forget to pick them up. The number of keys is difficulty dependent.
Key drop per difficulty:
- Painful - 1x
Key of Prowess - Excruciating - 2x
Key of Prowess - Fatal - 3x Key of Prowess
- Infernal I - 4x Key of Prowess
- Infernal II - 5x Key of Prowess
- Infernal III - 6x Key of Prowess
Community content is available under CC-BY-SA unless otherwise noted.
