Pastwords
"But before you dive in, you must first learn the sacred incantations that will enable you to turn back the clock. The pastwords.
Sadly, these were long since scattered across Erdrea. This being so, I have entrusted my most dependable tockles with the momentous task of seeking them out."
—Stickle, Mayor of Tickington
Pastwords are special incantations found in the 3DS and Definitive Edition versions of Dragon Quest XI. These secret phrases can be learned from tockles who are scattered around Erdrea, and allow the party to use the tomes in the Echo Chamber to travel to the worlds of previous Dragon Quest series games and restore the proper flow of history.
Three pastwords are learned within the worlds accessed by the altars after completing a sidequest rather than in Erdrea. These pastwords are used to access alternate versions of Baramos's Castle, the Roamer Encampment and Chateau Felix.