I have always wondered what being hit by offensive arcane or shadow spells feels like. I'm not thinking about shadow priest spells which assault the mind or spells like Corruption and Agony, I'm thinking about spells like Shadow Bolt and Hand of Guldan. Would it feel like being hit by an invisible force or is it something totally different like assaulting the "soul"? Does a Shadow Bolt draw blood? The same applies for arcane spells like Arcane Missiles and Arcane Blast. I don't think there's any lore to explain this, so what do you guys think about this?