The 1-Hour 8x XP Boost increases your combat experience 700% for 60min.
Used most effectively when you know how to attack and have several bases which yield good experience that you can do with just 3 warps. As of April 2, 2012, Combat strategy has been renamed to 1-Hour 8x XP Boost.
Can be found in store, won at Zoot's Loot or inside a Terraknor Box.
These can be specially useful once your army is built up enough to do constant fights, against enemies morefights=morexp morexp+Exp boost=lvlup.