The Obatymos-related missions gotten from an NPC called "Inventor". Play the last mission, "Battle of Mimicros", under the Easy difficulty setting to lessen your health loss gradually. After beating Igacleas, watch the brief cinematic, then go back to town and talk with the Innovator. Keep in mind that the Easy difficulty setting is not offered for hardcore characters. Use Pollevia Berries to recover if you are attempting to complete the last mission with a hardcore character.