Martian Saucer

The Martian Saucer is a large flying boss that spawns during the Martian Madness event. The Martian Saucer moves through blocks, and has four turrets with independent health meters that must each be destroyed before damaging the saucer itself becomes possible. The turrets include two rocket launchers and two laser machine guns. In addition, the saucer itself fires a large beam ("death ray") that can only fire directly downward, and which cannot be destroyed independently. The player can damage the core only if all four turrets have been destroyed.

Behavior
The Martian Saucer has three attack modes it cycles through in order. It always moves a short distance between them.
 * 1) The Saucer locks onto your current location and fires a volley of lasers at that location. This attack does not follow you if you move around.
 * 2) The Saucer fires multiple small homing missiles from its cannons.
 * 3) The Saucer positions itself above the player before unleashing its "death ray," traveling in the direction you were in.

After the turrets and cannons are destroyed, the saucer stops and shakes for a moment as its core becomes exposed. The core may be damaged during and after the transformation. In this stage, the Saucer will fire only its death ray, always moving towards the player. The death ray deals massive damage, even to those with Solar Flare armor. It also fires yellow flames that linger on the ground for a while that deal damage if touched, similarly to one of the attack by Mourning Wood.

Tips

 * To dodge its first attack, hover above or below its lasers. To dodge its second attack, run away from the saucer as it shoots so that most of the missiles hit the ground in front of you. To avoid its third attack, as well as its final enraged stage, simply stand under blocks.
 * Stand under blocks for the duration of the encounter while firing a homing or block-piercing weapon, or use minions. The Stardust Dragon minion is capable of killing this boss without any intervention from the player, and the Piranha Gun or a high-tier Yoyo can be used from hiding. Scourge of the Corruptor or Possessed Hatchet may also be useful.
 * It is easy to dodge the saucer during its berserk stage by moving away from the saucer wherever it is while flying. This means that the "death ray" can't catch up to you and that you don't touch the yellow flames it produces.
 * With a decent weapon and armor, such as Nebula Blaze with Nebula Armor, the Martians may be killed quick enough to prevent the spawning of the Martian Saucer.