Lure or Agro script

[Felixiii]

Hi, I'm new to the boards and I couldn't find any sort of agro or lure type scripts... I'm looking for something where you can cast a spell which forces enemies to focus all physical attacks done on a selected target. To ensure that my Heavy Armored characters take the brunt of the damage. If someone out there could figure out how to do it that would be wonderful.
thanks in advance