Complex sentence: Thanks to Superman's weakness to magic, Captain Marvel is able to do a significant amount of damage to Eclipso; a prominent method of attack he uses is to continuously trigger his transformations in close proximity to Superman, resulting in the lightning striking Eclipso.
Split into simpler sentences: Thanks to Superman's weakness to magic, Captain Marvel is able to do a significant amount of damage to Eclipso. A prominent method of attack he uses is to continuously trigger his transformations in close proximity to Superman, resulting in the lightning striking Eclipso.