"I'd rather hear the screams of battle than the quiet that follows." —Talara, elvish safewright
All creatures leave the battlefield simultaneously. They’re not destroyed; they’re just put on the bottom of their owners’ libraries. This includes token creatures, though they’ll cease to exist as soon as Hallowed Burial finishes resolving.
Each player chooses the relative order of the cards he or she is putting on the bottom of his or her library, regardless of who controlled them while they were on the battlefield. Players don’t reveal this order to other players.