Angry Birds Ace Fighter/Challenge



There are 5 ranked battles:


 * Endless League: Endurance mode. Provide gears and crystals.
 * Arena: Ranked boss battle. Provide diamonds and rewards.
 * Duet: Ranked co-op battle. Provide medals, pet fragments, and soul gems.
 * Trial Tower: Stage ranked battle. Provide gears and enhance gems.
 * Tournament: Challenge 9 CPU players to get rewards.