You have honed and perfected your skills fighting against spellcasters, possibly from your background hunting mages as part of the Arcanist Inquisition. You gain the following benefits.
Ability Score Increase. Increase your Strength, Constitution, or Wisdom score by 1, to a maximum of 20.
Dodge Spells. You can take a Reaction to avoid a spell that is targeting only you and doesn’t create an area of effect. Make a Wisdom saving throw against the spellcaster’s spell save DC. On a successful save, the creature must choose a new target or the spell is canceled. A canceled spell dissipates with no effect, and any resources used to cast it are wasted.
Keep Your Enemies Close. When you hit a target that can cast spells with an attack roll using a Melee weapon or an Unarmed Strike, you can reduce its Speed by 15 feet until the start of your next turn.
Resist Curses. You have Advantage on saving throws against all Shadowsteel curses, and also against spells with a duration of more than 10 minutes.