Crawltipede

The Crawltipede is a strong, flying, worm-like enemy that spawns in Solar Pillar areas during the Lunar Events. Uniquely, it has no health bar. Instead, its weak spot is its tail, which can be difficult to hit. However if you manage to hit it you do 10 times more damage than you normally would against an enemy. It seems more aggressive than normal worm enemies, and will fly directly at the player if they are airborne, dealing high damage until it is killed.

Tips

 * The Crawltipede only targets airborne players (does massive damage) and is hardly avoidable even with good wings. Because of this, it's recommended to defeat the solar pillar from the ground.
 * The Crawltipede will not target grounded players, but if it happens to spawn below you or be drawn down by another player, it can still do great damage if it happens to touch you.
 * Short jumps into the air are usually possible, but it's important to land again quickly. They immediately break off attacking when you touch the ground, but this doesn't mean they instantly get up and out of the way; it is still possible to run into them.
 * The Crawltipede can go about as fast as you can, so if it touches you, it'll probably at least severely damage you.
 * Having a homing weapon such as the Razorblade Typhoon or Chlorophyte Bullets will make fighting these much easier.
 * Fighting this monster as a gunner will prove to be difficult, considering ranged players use wings/boards/whatever for flying around most of the time and shooting enemies doing so, especially with the Hoverboard, considering it gives plenty of speed with it's "left/right & down" movements.
 * Summoner Minions make short work of this enemy as they tend to target the tail.
 * Items that allow dashing make these substantially easier to evade.
 * To cope with the fast and accurate AI of the Crawltipede, the player can make it swirl around him/her, effectively dodging its attack. The UFO mount provides a good amount of mobility to do that.
 * It is a good idea to stay in the middle of the Crawltipede if it tries to spin, the player can attack it while avoiding it's attacks
 * Vampire Knives is the best melee weapon against crawltipedes, because of the amplified damage and health return ratio. Players can very swiftly restore a LOT of health by attacking the tail end (which is the only end hittable), and will find themselves hitting the two hearts capacity with just one or two successful attacks.

Trivia

 * If using a decent magic weapon and Spectre Armor with the hood, hitting the tail can heal for 600+ hp, the highest self heal per hit in the game.