[Spell] Prevent Orb of Slow from working on magic immune units

[TimeForAChange]

I noticed recently that Orb of Slow and items with abilities based on it will all work against magic immune units. They also allow heroes with the magic damage type to attack magic immune units. Is there a way to prevent this? I haven't been able to find anything.

 

[Rigborn]

Well i think you can do this not sure tho.
If a unit is attacked
Attacking unit has orb of slow item
Attacked unit is immune to magic
Remove buff from attacked unit.

 

[Jampion]

They also allow heroes with the magic damage type to attack magic immune units. Is there a way to prevent this? I haven't been able to find anything.

This is probably because orbs enable the second attack type, which has Hero attack type by default. If you change this to magic as well, they can no longer attack magic immune units.

These kind of orb abilities also bug, if the unit auto acquires targets. It's better to use triggered orb abilities. Then you can decide whether you want the unit to be affected or not.