[JASS] WoW: Power World Shield&Shield Block

[foo_sharp]

Hi there,
I am currently working on a WoW-based map. So far, none of the spells have posed serious problems.
But, I honestly have no idea how to do the priest's ability Power Word Shield (http://www.wowhead.com/?spell=17 -> i do not need the spell cast interrupt part) and the warrior's ability shield block (http://www.wowhead.com/?spell=2565).
I know that there already are systems dealing with these sort of spells (damage detection etc.), so what I need is a list of what systems I need to create these two spells and if possible the code for the spells itself .

 

[xD.Schurke]

damage detection should ne enough, I would say use Intuitive Damage Detection
It's easy to use

 

[foo_sharp]

damage detection should ne enough, I would say use Intuitive Damage Detection
It's easy to use

First of all, thanks for you help, but my triggerer didn't understand the system so he started making one of his own (edit: and is done with it now)
Anyway, +rep for you