Why the free action?
I can see why the petrification immunity, and the petrification is relevant.
Also, why the extra attack? Dart(ists

) users get loads of attacks anyway because of the nature of the weapon. I'm not convinced they *should* get another attack - I mean, it comes from a chicken lookalike
Also... (monsterours manual)'While the fatal touch of a cockatrice's beak will affect victims clothed in leather or fabric, it will not work through metal armor. The touch will, however, extend into the Ethereal Plane.'
Any chance of a serious THAC0 penalty against opponents in metal armour?
Sounds pretty good though, and I suppose darts REALLY need something to redress the balance towards them...