Heavy Weapons Expert

You are now able to infuse your weapon attacks with a brutality unmatched by most mortals. You gain the following benefits:

• You learn the Great Weapon Fighting style, if you don't already know it.
• You can wield a single melee weapon with the two-handed property in one hand instead.
• Your attack rolls with heavy weapons you are proficient in now score a critical hit on a roll of 19 or 20.
• Starting at 5th level, you can use your reaction to add half your proficiency bonus to your AC when you are targeted with a weapon or melee attack and you are wielding a weapon in two hands.