Grand Arena Card Series mXP Rules Each completed Series earns 2,000 mXP per monthly snapshot. Holding 5+ unique Series increases this to 2,500 mXP per unique Series, and holding 10+ unique Series increases it to 7,500 mXP per unique Series. Completing all unique Series unlocks a repeatable +25,000 mXP bonus. All snapshots start at launch of Grand Arena Season 1.