Sakashima of a Thousand Faces and Loyal Retainers on the battlefield.
It is your precombat main phase.
Steps
During your precombat main phase, activate Sakashima of a Thousand Faces by sacrificing it, returning Sakashima the Impostor from your graveyard to the battlefield as a copy of Loyal Retainers.
Activate Sakashima the Impostor by sacrificing it, returning Sakashima of a Thousand Faces from your graveyard to the battlefield as a copy of Loyal Retainers.