casting delay?

i have a custom ability based on shadow strike and i made it an item ability
i gave a poison item the ability so if u wanna cast it, all you have to do is, click the poison item in your inventory then click a target

what i wanna do is have a casting delay of maybe 4-5 seconds before the poison is actually applied (it takes a while to get the poison ready to poison the target) and the casting unit should be vunerable for this period of time

theres a casting delay for the ability but when i modify it, but the poison is still cast immediatly, i thought casting delay would do the trick (i looked at other spells and flamestrike has a 1.33 delay while others spells have none)

but even increasing to 4+ secs, the poison is applied immediatley
how should i make it have a delay?

Casting delay with shadowstrike actually means the time between each damage tick. ie Deals 10 damage every Cast Delay seconds.

This sounds like a pretty hard problem, almost certainitely requiring JASS. Unless theres some method I'm missing I think you basically need to catch the other in the act, pause the unit for a few seconds, then unpause the unit and complete the casting.

pausing the triggering unit, waiting 2-3 seconds , then unpausing should work right? im gonig try that right now