ive heard something that you can do extra damage with the heal and i wonder how to do that, or if you even can

??????? all units that get healt do as many domages (physical dmg) in small aoe around them, so if enemy no armor gg domages )

Each unit that the heal bounces off of does x amount of damage. So if dazzles heal does 40 dmg, and it bounces off of 3 units, then the enemy hero will recieve 120 damage