Looking for a Monster "assassination" power

[Pennarin]

This monster I have teleports into enemy ranks, uses Cloud Mind on his foes (a close burst power that renders you invisible to targets in the burst until you move or attack, the likes...), and then when it attacks it gains some kind of benefit from having waited before doing so. A bit like the 3e Assassin PrC.

Maybe get combat advantage against anyone in the burst, if it doesn't attack on its next turn?

Have you seen such an ability in the MM or in a forum, or have an idea how to create it?

 

[DanmarLOK]

Quick thought but have the cloud minds power give it CA and then simply give it xDx extra damage for combat advantage and call it Backstab or whatever? Lots of monsters have that and it doesn't require anything odd.

 

[Pennarin]

Thanks, I'll go with that! I came to the same conclusion looking at the 'ganger.