Purple Dragon

[N3MES1S]

As far as i know, ball of lighting is based on the ammounth of hit points your enemy troop has. If u can combine ball of lightning + any spell that increase health (i think peacefulness cant remember well), u can kill 2/3 from a troop (or the entire troop on higher levels) of 1000-1500 units (and if u use , like DGDobrev said, the mark of blood u can see how the light shine -.-).. This means ball of lightining is "designed" for big numbers troops.