Board Thread:New on Terraria Wiki/@comment-24978550-20140525041130/@comment-25007246-20140625055734

Sorry, the mooons are Pumpkin and Frost moons. Theyre wave events with multiple bosses at an endgame level.

Links:        http://terraria.wikia.com/wiki/Pumpkin_Moon

http://terraria.wikia.com/wiki/Frost_Moon