It just does not feel right. It should heal him if anything.
“There’s no such thing as friendly fire”
-Blaze
And Jaina / Arthas should deal double the dmg with their Ice skills 
Now imagine all the zerg heroes getting benefits from Zagara’s creep. 
I mean Tyrael doesn’t really stay dead for the rest of match after dying first time.
I wonder how Butcher collects meat from Leoric.
Straight off the bone.
Calcium is a buff.
Why is Fenix the only Protoss with a shield?
Just imagine that it is CyberHawk or StormBot/ StormPunk tech.
because balance
But…Artanis?
20 characters
But Tassadar has one one on demand and Artanis has one via his trait…
And you think this game would be more balanced if every hero had their respective power based on their respective lore?
Balanced? Nah.
But it would be funny to see Murky try to take on Hammer if both were lore friendly implementations.
And neither of them are real protoss shields.
Ragnaros wishes he was blaze lol
Correct me if I’m wrong but didn’t you say:
If you’re going to shift the goal post and say why don’t they have shields like Fenix, well that’s easy. It’s a design choice, to make each hero stand out and feel unique - after all, HoTs is a moba, not an RTS.
How does Valeera silence Ragnaros with a piece of rope?
How does she eviscerate Leoric?
Why can Dehaka burrow to avoid Thrall’s earthquake?
Why can almost no hero use their hands and feet at the same time (attack while moving)?
Why can Murky give birth to himself? Why does a male lay an egg?
…
It’s a game.
All of them have a baseline shield ability minus zera, last I checked her could pick a talent for that.