St. Orgaeus, Fetish of War

Zealotry—During your combat phase, all creatures you control are tapped and attacking.
(As this creature enters the battlefield, instead exile
it. If the condition is fulfilled, you may play this creature from exile as though it had flash, it gains shroud, return it to exile at the end of the step or phase, it loses shroud.)

Other creatures you control get +3/-1 and gain
reach and myriad until end of combat.