[General] Unique and Universal cast (Channel ability)

[BETABABY]

What is Unique and Universal of the ability "Channel"? This has been bothering me for some time now.

I only know Visible (which enables the spell to appear in the spell slots) and Physical(Which enables your ability to target magic immune, I think).

 

[Death Adder]

As far as I know is that Universal means that you can target both ethereal and magic immune targets, it won't make magic or spell damage deal damage to magic immune targets, for instance, however.

About Unique cast, I've got no idea though.

 

[BETABABY]

Thanks anyway... So its okay to check Universal and uncheck Physical?

 

[Wietlol]

Universal spells will not be blocked by spell shield.

Unique casts has something to do with when you select a group of units and order them alltogether to cast the ability. However what the effect of that was, I dont really remember.