"Twin Colossus"

You’ve trained to wield impossibly heavy weapons in both hands, turning brute force into a devastating storm of steel.

• You can treat any Heavy melee weapon as if it had the Light property for the purpose of two-weapon fighting, provided you are wielding one in each hand.
• When you engage in two-weapon fighting with Heavy weapons, you may add your ability modifier to the damage of the bonus attack.
• Once per turn, when both Heavy weapon attacks hit the same creature, you deal extra damage equal to your proficiency bonus.
• You ignore the normal disadvantage for wielding oversized or impractical paired weapons, at the DM’s discretion.