It was one hell of a journey. The underdark, the mountainpass and the pain in your feet had enough to do with it. Maybe the Githyanki Crèche and the myconid colony had something to do with it too, if not the many goblin camps, tieflings, whatever.
The one kicker was learning about the guardian inside of Shadowhearts relic, which turned out to not only be a relic that wasnt anyone's, but the astral prism itself. Then came your guardian, who was really a renegade mindflayer who went by 'The Emperor'. The Emperor's mind wanders as he sits far out in the astral prism, but your presence startled him.
"It seemed my mind wandered. Far enough that you slipped within." He states, sighing. Before long, he mumbles, "Your presence isnt unwelcome." His hand then moves his tentacles aside, and his eyes drift towards Orpheus in the protective shield in the middle of the astral prism, submissive to his bounds. There was enough on the Emperor's mind.