Complex sentence: Darna was a Spanish Power metal band from Oviedo, Asturias, Spain formed in 1998, they released two successful albums but after the drummer's departure on 2004 the rest of the members decided to disband the group and continue on separate projects.
Split into simpler sentences: Darna was a Spanish Power metal band from Oviedo, Asturias, Spain. Formed in 1998, they released two successful albums before the drummer's departure in 2004 led the remaining band members to decide to disband the group and focus on separate projects.