You have trained in the use of oversized weapons as outlined on page 277 of the Dungeon Master's Guide.

You gain the following benefits:

• Increase your Strength score by 1, to a maximum of 20.
• Two-Handed weapons sized for a creature of your size or smaller lose the Two-Handed property, allowing you to wield them in one hand.
• When wielding a versatile weapon, you may use the two-handed damage die, even when wielding it in one hand.
• You do not suffer disadvantage on attack rolls made with a weapon that is sized for creatures of one size category larger than you.

Weapons sized for creatures one size category larger than you gain the Heavy and Two-Handed properties. Attacks with weapons sized for creatures two size categories larger than you are made with disadvantage, and weapons three or more categories larger are unusable.