Over the course of WoW's nearly 10-year history, raiding has probably undergone more iteration and change than any other game system. To put the upcoming Warlords of Draenor raid changes into proper context, this three-part blog series will attempt to retrace the twists and turns of our raid design philosophy from Molten Core through Siege of Orgrimmar. Veterans will hopefully enjoy the trip down memory lane, and we hope those who discovered raiding later on will gain some insight into how things used to be . . . and why they changed.Classic World of Warcraft (2004-2006)