[Kingly_Krab]

If it's an invisible man you won't be able to see it anyway, haha, kidding. But you can just use $npc->SpellFinished(#, $client) in sub EVENT_ENTER.

EDIT: I'm not sure of how to stop the client form actually getting a message like a spell was cast on them, but at least this way it doesn't show, "NPC casts spell on client," you just get the spell message.