Shield of Festung
For all their brilliance and power the fell mages of the Festung still have great need for strongarmed servants—both living and undead. The mortal warriors that tend to the foreboding keep are compensated well for their services but also their discretion, the oaths they take swearing them to secrecy by a compact made as much of will as magic.
Your Strength and Wisdom scores each increase by 1, to a maximum of 20.
In addition, you gain the following features.
Conjurer Combatant. You gain an expertise die on ability checks made to recall information about celestials and fiends, and when you are not bloodied you gain an expertise die on attack rolls against them.
Splinter Resistance. When you are bloodied and fail a saving throw against a celestial or fiend, you may choose to succeed instead. Once you have used this feature, it cannot be used again until you finish a long rest .