Bruiser

You’ve gotten adept at inflicting bumps and bruises to your enemies while walking off your own.

• You can Apply a bonus to your damage equal your Strength Modifier (half rounded up if apply alredy apply). 
• if your Constitution Score is higher than your target your critical treshold changes to 18 or Higher. You must be using a melee weapon to apply this bonus.
• Whenever you take the Attack action aganist a prone target you can make an additional attack to that target.
• Whenever you deal Bludgeoning damage, deal 1d6 Thunder damage. Deal 1d12 instead if the target is prone.
• Whenever you kill a creature with Bludgeoning or Thunder damage, gain 1d6 temporary hit points. Gain 1d12 instead if the target was prone.