The Emperor Protects

Gift an extra turn (You may promise an opponent a gift as you cast this spell. If you do, they take an extra turn after this one.)
Create four 2/2 blue Bird creature tokens with flying. If the gift was promised, all permanents you control phase out, and until your next turn, your life total can't change and you gain protection from everything.
Exile The Emperor Protects.

We are vigilance unending. We are duty unstinting. We are punishment inescapable. We are the Adeptus Custodes, and all must fear