Poisondial SoSa with Mummy replacing SoD and all unupped. Not that impressed.
Sundials prevent your own mummies from attacking as well.
I made something like for countering RT in a tourney with novas instead of SoSac and it worked pretty nice once you get enough damage to kill with sundial chain.
^
Think you can deal 20 poison damage. You a have a Sundial in your hand,and 2 mummies on the field. You have 2 HP and opponent has a graboid. Opponent has 50 HP. You can play sundial and deal poison damage then reduce it's HP to 30,and preventing opponent from killing you. And then next turn,you finish up with mummies.