I like this idea too, especially if it ends up being a level 5 spell to replace Blade Hands in the Tr starting book. Simple damage boosts are boring. However, I don't think you can call it a Sky Beast Form without the uncontrolled invis (which might be fun if it can be implemented properly). If that...

Guys, have you ever used nets? Are you aware that trapped monsters can't attack? I'd be more worried about its overpowerdness that its lack of usefulness. I've used nets and seen monsters break out of them, and the first thing I thought of was the damage an octopode would take once that orc chopped...