[Eccho]

Well, the spell can be active more than once, simply to demonstrate that it is Mui. It is up to the user to change the spell duration to something higher than 20 seconds.

I thought I did do so. And yeah I did. I decided not to make an OnDestroy method for the missile since it haves to loop through all missiles attached to the data struct anyways. Therefor, I nulled them before I call the 'native OnDestroy' at the end of the OrbitalMovement:

set j = 0
loop
    exitwhen j >= dt.mtot
    call KillUnit(dt.m[j].mis)
    call DestroyTrigger(dt.m[j].trg)
    set dt.m[j].mis = null
    set dt.m[j].trg = null
    call dt.m[j].destroy()
    set j = j + 1
endloop

Thanks for the warning though:p