Complex sentence: Doctor Druid possesses various Celtic mystical artifacts as well; at one time, Druid even had access to the Moebius Stone, which was a mystic item Agamotto created that had a limited ability to manipulate time.
Split into simpler sentences: Doctor Druid possesses various Celtic mystical artifacts as well. At one time, Druid even had access to the Moebius Stone, which was a mystic item Agamotto created that had a limited ability to manipulate time.