Splash slow poison

[Orphea]

Is it possible to add stackable (damage) slow poison onto either the main target or all damaged target of a unit with weapon type missle splash?

 

[Goldfinger]

You will need a damage-detection system to detect the specific attack. Then select all nearby enemies within a radius of the attack target, add the selected units to a group, pick each unit and create a dummy unit (give the dummy the same slow poison), order the dummy to attack the picked unit, and destroy the dummy after it attacks (use a timer so they don't persist).

Alternatively, it's easier to make a dummy spell based on Acid Bomb and cast it on the attack target. This requires creating fewer dummy units and avoids managing unit groups.