Although the Mahayana practitioner seeks to become a bodhisattva too, Mahayana does not give so much emphasis on mystical or magical practices as in Vajrayana.
“Mysticism,” as seen in Vajrayana, means that one seeks union with the divine, so the point where one embodies the divine.
Thus the practitioner becomes a cosmic Buddha (not just an ordinary historical Buddha) by adopting all the characteristics of that Buddha and seeking a magical connection to that Buddha through rituals