See also: Heart Ablaze
Heart of Iron grants Karlach 
Advantage on Saving Throws against 
effects.
Description
The infernal engine that is Karlach's heart is burning more evenly.
She has Advantage on Saving Throws against being .
How to learn
Other ways to learn:
- Bring an
Infernal Iron to Dammon in Chapter One, as part of the quest The Hellion's Heart.