Arcane Duelist

You seamlessly blend martial prowess with arcane power in a dance both beautiful and terrifying. While wielding a one-handed weapon with which you are proficient:

• You treat the hand wielding the weapon as free for the purpose of performing the somatic component of spells.
• When you cast a cantrip in which you make one or more spell attacks, you may treat the range of any of the attacks made as 'reach'.
• When a hostile creature's movement provokes an opportunity attack from you, you can use your reaction to cast a spell at the creature, rather than making an opportunity attack. The spell must have a casting time of 1 action and must target only that creature.