The Totem of the Moon

The Totem of the Moon is located on the third sky island, and is only accessible by dropping a Spirit Key into the Spirit Lock to open a temporary path with a set timer. Some people just use the leaf-jumping technique, but is extremely hard to master. It is super convenient that the Crystal Guardian is located on the second sky island, and drops a Spirit Kay when defeated. When destroyed, The Totam of the Moon will drop:

Raw Magnetite 1x

Stone 3x

Destroying it will also summon a Meteor to appear somewhere on the map, which is the main reason why somebody would want to break it in the first place

Hp: 3k (3000) Hp

Unfortunately it has been removed in the 3/21/2018 update, and has been replaced by the Lonely God.