Grievous's Assault

Put 3 3/4 colorless Guard Droid artifact creature tokens onto the battlefield.
If you control a Grievous creature Put 3 3/1 colorless Droideka artifact creature tokens with indestructible, Put 3 2/2 colorless S. Battle Driod artifact creature tokens onto the battlefield and 5 1/1 colorless Battle Driod artifact creature tokens onto the battlefield.