Quest 130

Quest 130 - Training with a Demon Instructor! (鬼教官の特訓！)
Location: Glen Castle 1F (グレン城) D6 Starting NPC: Instructor Ranbaba (ランババ) Requirement: Lv50 Initial Reward: Special Training unlocked Replay Reward: Gold Stone EXP/Fame: 16560P / 86P

Walkthrough
This unlocks Special Training, which can be switched to by selecting the option from the Dharma Priests. Instead of Experience points, you will be earning Special Training Stamps which, after enough of, you'll gain a skill point. You do not earn any EXP while in this mode, so it's best to switch to it once you hit level cap.
 * Go to Beacon Valley (ベコン渓谷) @ E4 and talk to Gragado (グラガド).
 * Route: Glen Castle Town → Glen West → Beacon Valley
 * Defeat a nearby Togre (ネクロバルサ) to get the item Evil Horn (邪鬼のツノ). This is tough to do at level 50, so it's best to leave this for when you're higher level or get higher level allies to help you defeat it. They can be found around E-5 in Becon Valley.
 * Talk to Gragado again and then return to Glen Castle. Talk to Ranbaba to clear the quest.