You have honed and perfected your skills fighting against spellcasters.  You gain the following benefits:

• Whenever a hostile creature targets you with a spell, make a Wisdom saving throw against the spellcaster's spell save DC.  On a success, the creature must choose a new target or lose the spell.  This does not protect you from area effects, such as the explosion of a fireball.
• Whenever you hit a spellcaster with a melee attack, the target's speed is reduced by 10 feet until the beginning of your next turn.
• You have advantage on saving throws against being cursed.