Jormungand

Jormungand is the Guardian of Immortal Battlefield. You need the Pochette Key to fight it.

Glossary entry
''One of the sons of the 6th Children Trickster. He has the unique ability to control an enormous serpentine war machine that no one else could use. A follower to none, he used the machine to cause vast destruction and was thus imprisoned in the bottom of the great conduit of the Immortal Battlefield.''

Mechanics
The fight consists of the same patterns of attack and movement no matter what, though it changes depending on whether you play on Hard Mode or not.

Attacks

 * Simply running the player over


 * A repeater pistol that deals little damage but fires often


 * A heavy pistol that deals more damage but is easily avoided


 * A rocket launcher that creates a lingering explosion on the ground


 * Flares that launch while he is in the background

Strategy

 * During the course of the fight, the vehicle you ride in is able to jump far higher than usual, making it possible to jump over Jormungand. As he deals massive contact damage, utilizing this is necessary, especially on Hardmode.
 * Using Flares is the quickest way to deal with him. However, on One Arm/Finger, it is necessary to let him get in front of you, which often means long stretches of simply dodging.