Kneel before your King!

Tap each creature you don't control.
If you control a legendary creature, untap all creatures you control.
"And behold, the almighty God-King Settra did
awaken from his sleep of blessed oblivion. His legions,
long buried beneath the sands, did arise and stand to attention, awaiting his order. And he did say "War!",
and the world did tremble"
-Grand Hierophant Khatep