Psionic Dominance is a reaction and Illithid Power. This feature allows a character to use a reaction to nullify a spell of lower or equal level to their Proficiency Bonus when targeted by an enemy within 18m.
Description
Nullify another creature's spell as a reaction. The spell must be 3rd Level or lower. If it is higher, you must succeed a Check to nullify it, the difficulty of which is based on the spell's level.
Properties
Range: 18 m / ft 
Recharge:
How to learn
Used by creatures: Partial-Illithid
Other ways to learn:
- After becoming a Partial-Illithid, unlock from the illithid power skill tree with a Mind Flayer Parasite Specimen after obtaining one of the following:
Bugs
As of v4.1.1.4425968, this ability appears to be bugged. It works on Chain Lightning, a Level 6 spell, despite Proficiency Bonus being capped at 4.