Melee attack
Every hero can perform a melee attack to quickly finish off an enemy or do damage while reloading. Melee damage scales with levels and with certain items like 
Melee Lifesteal and 
Lifestrike. A light melee attack can be charged up to a heavy melee attack to dash forward and do more damage. Charging the melee attack can be done in the air. Performing a melee attack after a successful parry will deal extra damage.
Last hitting a Trooper with a melee attack will not make an orb appear and give you the full amount of souls you would have gotten if you shot the creep and the orb. Players can perform melee attacks on orbs.