Complex sentence: The Magus escapes the Soul Gem, although, reduced in an immaterial form, he absorbes the life energies of others to regain his full power, and plans to unsurp the cosmic power of Captain Marvel.
Split into simpler sentences: The Magus escapes the Soul Gem, although, reduced in an immaterial form. He absorbs the life energies of others to regain his full power, and plans to unsurp the cosmic power of Captain Marvel.