aura that reducing enemy's attack range

I have an idea of a spell,
The base idea is like an aura from a unit that make all enemy unit around him have their attack range reduced while this unit is around.
oh i forgot to add this also work as well as their range of sight

of course when that unit is move far away from enemy unit, they get all their range of sight and attack range back

anybody can help me?

It's not possible from what I know. Atleast not in Multiplayer.

Try with Acquisition Range, it is the closest thing you can do for this