Complex sentence: Elmore was in charge of creating a look for the Dragonlance saga, and did many of the early sketches for the series, his first cover appearing on "Dragons of Autumn Twilight".
Split into simpler sentences: Elmore was in charge of creating a look for the Dragonlance saga, and did much of the early sketches for the series. His first cover for the series was on "Dragons of Autumn Twilight".