Creating a taunt type mechanic

[Admetrynne]

I have been thinking of a way to do this and it just hasn't been coming to me and haven't found anything about it on the forums here so I thought I would ask and see if anyone else had any ideas.

I am looking for a way to make an ability that when cast, makes all of the enemies focus their attacks on the person that cast it. Similar to that of the decoy spell from final fantasy 12.

Thanks ahead of time for any help with this question