One of Greater Strength

You've gone beyond the normal Strength of a warrior in your training. You gain the following benefits:

• On your turn, when you score a critical hit with a melee weapon or reduce a creature to 0 hit points with one, you can make one melee weapon attack as a bonus action.
• You can wield a Two-handed weapon with one hand at the cost of 10 feet of movement speed; this is negated if you have a Strength of 18 or above. 
• You can carry an additional 50 lbs. before becoming over encumbered.