User blog comment:MarieBilly Archimedes Shears/Lunar Boss and Lunar Update Ideas/@comment-15177801-20140113194346

A way to add to this could be have the 'moon charm' and 'sun charm' be ultimate items getting 1 from sol and when luna's at half health she drops it so you combine them and defeat luna once and for all but when you dispose of the ultimate accsecory cthulu gets it and spawns (and say you prevoiusly fought a 'easy' cthulu but he got revamped like the hardmode bosses) as a ore difficult version.