Chrono XP is an element to improve your Chrono Imperium meter. This is a level progression system that rewards players for being long standing active members of the game.
 
You can claim your Chrono XP by interacting with the Giant Obelisk which sits in the center of Massina. The amount of earned XP depends on the number of Champions that a player owns. As your journey in Massina progresses you will earn more Chrono XP, reach higher tiers and earn better rewards.