Collect 20 emblems of the same type, and turn them in to the envoy in charge of that particular challenge to receive 1 X-Legend 10th Anniversary Honor Gem.
Just bring 4 more X-Legend 10th Anniversary Honor Gems to complete the quest, and you'll be rewarded with the unique X-Legend 10th Anniversary Conqueror title. This is only available during the 10th anniversary event!
* 20 Sprite Emblems can be turned in to Sprite Envoy Ishtar for 1 X-Legend 10th Anniversary Honor Gem.