I think he might be referring to the "Legacy Characters" feature:
"Legacy characters allow your characters on the same account on the server to receive a semi-permanent experience bonus.
- When players reach max level (for the current era) with a character, their account receives an experience bonus for all characters on that server.
- e.g., When a player has 1 max level character, their account receives a 10% bonus EXP buff.
- When a player has 2 max-level characters, the buff stacks. They now get 20% bonus EXP.
- This bonus caps at a 100% bonus.
- When the server's level cap increases, players will lose the buff until they get one of their characters to max level again, and the bonus starts again at 10%."
To my knowledge, this only exists on Oakwynd and thus would not apply to Firiona Vie server (and doesn't at this point require level 120 since Oakwynd has a much lower level cap currently). Since the bonus caps at 100%, you'd just need 10 character slots to max the bonus.
Time to banish the shadows.
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