PvP Stronghold are Player versus Player guild missions in which guild team members must complete various tasks in the Stronghold game mode. It may fill the PvP mission slot, and potentially any general mission slots if "No Preference" is selected.
The mission must first be activated by a guild member with "Mission Control" permission. A minimum of 3 guild members currently representing the guild must then participate in an event.
There are 3 levels, each with different requirements and rewards.
Summon 2 Mist Champions. Time limit: 30 minutes. Recommended: 3 players.
Win 2 PvP Stronghold Matches. Time limit: 40 minutes. Recommended: 5 players.
Summon 18 Mist Champions. Time limit: 55 minutes. Recommended: 8 players.
There is no "reset" time after abandoning these missions. The missions can be launched again immediately.