In Reaper Soul Revival, encountering the issue where a character has been taken back by the Soul King due to a prolonged inactive period can be resolved through the following steps:

1. Understand the Mechanism: Characters may be taken back by the Soul King after a period of inactivity as a measure to keep the game environment active. The specifics of how long this takes can vary.

2. Check Account Status: Log into your account, even if your character is unavailable. This will usually allow you to see any notifications regarding your character status or any ongoing events that might assist in recovery.

3. Contact Support: The best course of action is to directly contact the support team for Reaper Soul Revival. They can provide personalized help on recovering your character. You may be able to reach them through:
- In-game contacts.
- The official Reaper Soul Revival website.
- Social media platforms related to the game.

4. Follow Notification Guidelines: If you receive any notifications or messages from the Soul King or in-game alerts, make sure to follow any instructions they provide. Sometimes, there might be specific steps to restore your character.

5. Re-engage with the Game: If your character is unavailable, try re-engaging with the game's social platforms (like official forums, community discussions, or social media pages) to gather insights from other players who may have faced the same issue. There might be ongoing fixes or updates that can assist in recovering your character faster.

6. Monitor for Updates: Game developers often issue patches or updates that might change how inactive characters are handled. Keep an eye on official announcements or patch notes regarding the handling of character status.

By following these steps, you should be able to address the issue of your character being taken back by the Soul King in Reaper Soul Revival - learn more.