Great Weapon Weirdness

You've learned to use great weapons with one hand, letting its momentum empower your strikes. You gain the following benefits:

• Your strength score increases by 1, to a maximum of 20.
• You can wield a two-handed melee weapon in one hand. In your open hand, you can wield a light or finesse weapon. You cannot hold a shield or dual wield great weapons.
• On your turn, when you score a critical hit with a great weapon or reduce a creature to 0 hit points with one, you regain 2d6 health.