Greatsword Big Attack

you need 13 strength to use this

You swing your sword really ******* hard.

• if you get a critical hit with a greatsword or lower a creature to 0 hit points with one, you can  do one melee weapon attack as a bonus action.

• Swing your greatsword really ******* hard, you can have a -5 penalty to the attack. If the attack hits, you deal 10 more damage.