When you revisit the Deserted Island where you were stranded for three days and inside the Obel Ruins are two particularly difficult Boss fights. The one where you fought a boss called "Boss Crab" has been replaced with a recurring boss called "Ancient Crab." He is atleast twenty times tougher than Boss Crab, with 12,000 HP and nasty stats and attacks. Once you defeat the Ancient Crab you can leave the area (not the whole island) and return. He will be there again. Also, the Ancient Crab is by far one of the only monsters that will drop a Fire Rune piece. If your Hero, or anyone has that equipped, consider racking up a few wins against this beast to get a few of them. The bad one is the Killer Golem of Obel Ruins. He also reoccurs each time you leave Obel Ruins (the grassy part after the maze). His attacks are worse than Ancient Crab and he hits harder, also having 12,000 HP. Both are just 1,000 HP short of the final Boss of the game. However, the rewards are worth it. Ancient Crab will drop a quarter million Potch and Killer Golem will drop 30,000 Potch. If you are a hardcore gamer, have one of your party with a Prosperity Rune, have someone like Gunter in your support slot to watch those numbers at least double. Note: These bosses are just optional, and for a particular side quest, Killer Golem is avoidable; just walk around him.
