Saint-14 bows his head to you. "A fellow warrior of the Light. Come close, let me guide your path to the Lighthouse, my friend." Saint explains that to enter the Trials of Osiris, you must possess a Trials Ticket. Your ticket will track your wins. Each ticket has a different powerful effect.
Saint looks over a blank ticket. "You want as many wins as possible, obviously…" he chuckles. He continues, saying that seven wins with no losses grants access to the Lighthouse for Flawless Rewards. "I await your ascension to the Lighthouse. Good luck."
You can reset your Trials Passage on the item in your Quests tab, or on the Trials of Osiris activity node.