Together, Seofon and Tweyen dramatically expanded team-building options for endgame content. Their unique skill sets gave veteran players fresh reasons to revisit existing quests and experiment with new party compositions.

The biggest headline of v1.2.1 was the addition of and Tweyen (Tweyen) as fully playable characters. Both are members of the "Ten Heavenly Wings," an organization known for mastering ten different weapons and posing a "threat to the entire sky" in the original mobile game.

Four additional quests were later added to the game. These were actually introduced in version , not 1.2.1, although confusion persists online: