Here is a charm person with some interesting mechanics attached. Note that this version requires a repeated use of a standard action by the Wizard, making the action budget balancing on it far less extreme.

Charm Person
"You wouldn't hurt a friend, would you?"
Wizard lvl X Encounter or Daily * Arcane, Implement, Mind Affecting, Psychic, Charm
Range: 10
Target: Single creature
Attack: Int vs. Will
Hit: The target may not make an attack against the caster or the caster's allies until the end of your next turn. If the target is damaged by yourself or an ally of yours, the effect ends.
Sustain Standard: Make a secondary attack.
Secondary Range: 20
Secondary Attack: Int+2 vs. Will
Secondary Hit: The effect continues until the end of your next turn.
Special: You get a penalty to your secondary attacks equal to the number of allies of the target you, or any of your allies, have attacked since Charm Person was cast.
Special: If you score a critical hit with this power, if the target is the only enemy left in an encounter, the effect lasts until your next extended rest, or you attack an ally of the target, whichever comes sooner.