Complex sentence: Kieve is a member of London's Magic Circle, one of the largest magician groups in the world, and his illusions and magic effects can currently be seen on the West End stage in Lord of the Rings Musical at the Theatre Royal Drury Lane.
Split into simpler sentences: Kieve is a member of London's Magic Circle, one of the largest magician groups in the world. Most notably his illusions and magic effects were seen on the West End stage in Lord of the Rings Musical at the Theatre Royal Drury Lane.