When a spell or effect would deal half damage on a successful Dexterity saving throw, it deals no damage if you succeed and only half damage if you fail.
Whenever an enemy within 60 feet targets you with a spell of a level that is lower than or equal to your proficiency bonus, you can use your reaction to nullify the spell.
Metamage Persecutor is a hostile Countermeasure Aberration character in Baldur's Gate 3 who may appear during the final battle Atop the Netherbrain if the player sides with the Emperor. It will appear if a sorcerer is present in the party.
Slow up to 6 enemies. Their movement speed is halved, their Armour Class and Dexterity saving throws are reduced by 2, they can only take an action or bonus action (not both), they cannot take reactions, and they cannot attack more than once per turn.
Create a point of intense gravity that pulls in all nearby enemies and possibly Slows them. Their movement speed is halved, their Armour Class and Dexterity saving throws are reduced by 2, they can only take an action or bonus action (not both), they cannot take reactions, and they cannot attack more than once per turn.
While the player character can only use Psionic Dominance once per long rest, the Metamage Persecutor is able to use it multiple times so long as it has a reaction to spend.