Mechanical Bee

The Mechanical Bee is used to summon the The Peacekeeper boss. It is is crafted with 3 Crispy Honey Blocks, 3 Honey Blocks, 5 Iron/Lead Bars, 1 Soul of Light, 1 Soul of Night, and 4 Souls of Flight at Mythril Anvil. It can also be found rarely in locked Dungeon Chests. The boss can only be successfully summoned at night while in a Hive Biome; if the bee is used during the day nothing will happen and it will not be consumed.

Credit
Credit for this idea goes to zoomo.

His profile can be viewed here: http://www.terrariaonline.com/members/zoomo.71392/