Latest Astral Realm update bring us 100 vs. 100 PvP Arena called Golden Desert. Still no news about GvG.
2 Teams (Blue and Red, you can't chose your team).
To win you must conquer towers and keep killing enemy players.
Similar to dragon in MOBA games and Echo of Soul. If your team kill him you got points and buff.
Star Stones, furniture, mount and some more rewards.