Teferi's Moat + Painter's Servant + Mystic Decree

Teferi's Moat

Painter's Servant

Mystic Decree

How it works

1. Teferi's Moat prevents creatures of the chosen color without flying from attacking you.
2. Because Painter's Servant makes all creatures the chosen color, and Mystic Decree causes all creatures to lose flying, no creatures can attack you.