User blog comment:652Graystripe/Documentation: Lunar Boss Fight - Spoiler alert!/@comment-25196254-20150701023938/@comment-6646042-20150701025835

He dropped the portal gun and The Rainbow crystal Staff. The staff summons a crystal that rains lighting the enemy that does a base damage of around 150 damage. He also drops lumnite which you can use to make the four new armors.