Fanon:Heatseeker

DISCLAIMER: This isn't actually ToD, this is just what I'd do with it. "These tanks are AT THE BREAKING POINT! They just raid and raid and raid my lovely Wintercrest without any concern for anything whatsoever! So you know what? I'm gonna have some fun with revenge. They'll have nothing to hide behind once this thing gets through them."

-Ennealis

Overview
Heatseeker is a large nonagonal Polygon Boss that can withstand the harsh conditions of Wintercrest. It was created by Ennealis to destroy any tanks that enter the area.

This boss has a unique hybrid of a Heatseeker, a Deployer that has been modified to lock on to tanks and a Shotgun. It also has nine Trap Launchers that lay explosive Traps, and nine semi-active Phage Spawners.

It can survive Vallard Wastes, but does not need to, since it normally never leaves Wintercrest anyway.

Design
Heatseeker is a very large Nonagon with a mounted Shotgun-Heatseeker turret, and nine Phage Spawners and Mine Layers placed on the vertices.

Mounted Multi-Cannon
This Cannon is comprised of a Shotgun and a Heatseeker. They fire individually and can only target one tank at a time, but have special effects to be better at clearing out groups.

Heatseeker
This Cannon turns towards the nearest visible tank to the boss, then fires a Missile that's outfitted with a Machine Gun Cannon on its back. The Missile drifts on slowly for one second, and appears to be a bullet, before revealing its Machine Gun Cannon and rocketing over to its intended target. If its target moves, the Missile will turn and chase the target. It turns moderately quickly, but enough to be able to consistently dodge it with enough attention.

The Missile lasts ten seconds, until it's destroyed, or until it hits a tank, at which point it will explode in a small-medium area. The explosion does high damage.

The Heatseeker reloads slowly. If the boss cannot see a tank directly in front of it, but if the tank is still within 200 tiles of it, the Heatseeker will fire a Missile in a completely random direction, at which point it will rocket forward and turn only if it encounters a tank on the way.

Shotgun
This slowly reloading Cannon is simple. It turns towards a tank then fires a random spread of 12 Gunner bullets, 6 Basic bullets, and 3 Destroyer bullets.

Mine Launcher
The Mine Launcher is small, and shoots small Traps once every two seconds. These small Traps just sit there and behave like Traps, until the boss decides to detonate them or the Traps run out of health, at which point they will explode with the same properties as a Missile explosion.

Phage Spawner
These Spawners reload very slowly, summoning one Phage every 20 seconds. There are nine of them, however, and they each take turns shooting, meaning that one Phage gets spawned by the boss every 2.2 seconds. Heatseeker can summon four types of Phages, namely the Shadow, Skewer, Mine, and Exploder Phages.

Attacks/Behavior
Heatseeker can choose a few different kinds of attacks, mostly based on its minions. The boss itself can not control each individual Phage, but it can direct them to targets. Many attacks are purely based on the use of its minions for different purposes. When the boss first spawns, it creates a random Phage type, often making it a diverse mixture of all kinds when first encountered.

Heatseeker's "normal" state is where all cannons attack tanks like most bosses would do, and spawn many different Phage types normally. Even in this state, it is still very risky to fight alone. After a certain number of Phages spawned by Heatseeker are killed, it begins choosing specific attacks. It moves around slowly and follows its main enemies, only turning back once at the border of Wintercrest.

Heatseeker has two phases, both are very similar as the boss doesn't change in appearance. Only differences are the passive stat boost with resistance, faster spawning time, and stronger attacks. Heatseeker enters Phase 2 when it reaches 5,000 HP.

Phase 1
''There is one attack that is often used between other attacks mentioned above. Heatseeker switches to its normal state for 8 - 45 seconds after each attack''


 * Take Cover!: The Heatseeker turret will fire four Missiles that turn very quickly.
 * Phage Squad: Each Phage Spawner will summon one of each Phage type this boss can summon.
 * Detonation: Every Mine laid and Missile fired by this boss will instantly detonate.
 * Shotgun Stream: The Shotgun cannon will start firing very quickly, only firing one bullet at a time across its very large spread. The bullet has a 50% chance to be small, 30% chance to be medium, and 20% chance to be big. It stops this attack once 21 bullets have been fired.
 * Once All Together: Every single weapon will target different tanks each and fire exactly once, excluded from the regular cycle of firing.
 * It's Raining Explosives: The boss will target one tank for the whole of this attack. It will fire four Mines, a Missile, and five Mines again, then detonate them all. The projectiles this time move and turn very quickly, and have a much higher area of effect.
 * Jet Engines: Every single projectile created by this boss at the time this attack is used will gain a Machine Gun Cannon on their back, which fires red bullets that inflict Burning. This Cannon propels the ammunition at a faster speed than it was going at before, and also allows Mines to move.
 * Detonation Barrier: The boss will fire nine Missiles that begin orbiting around it and last until they're destroyed.
 * Detonation Barrier (Part 2): When a Missile is detonated, the boss will suddenly fly in the opposite direction to the one the Missile was in from its center. It will ricochet during these brief 3 seconds of rocket power.

Phase 2
Upon reaching 5,000 HP, Heatseeker initiates Phase 2, where it basically attacks with 10% increased respawn speed, and damage resistance goes up to 50% for as long as it is below 5,000 HP. Otherwise it behaves exactly the same. Additionally Heatseeker can regenerate back to Phase 1 if left along long enough. Heatseeker only gains a few attacks at this Phase.

Just like Phase 1, Heatseeker will revert to its normal behavior after it uses attacks. One key difference in Phase 2 is that it goes through attacks faster.

Heatseeker switches to its normal state for 8 - 35 seconds after each attack


 * Afterburner: Every projectile fired when this attack is used has a 66% chance to spawn under the effects of Jet Engine, and will also inflict Burning on contact.
 * Mine Your Back: The boss' Mines will teleport behind a random Tank before detonating a second later.
 * Snow Warning: A hail of bullets will be released from Heatseeker without warning. They're comprised of about 20 Gunner bullets, 10 Basic bullets, and 5 Destroyer bullets, and each of Heatseeker's sides fire one volley.
 * Shotgun Stream II: Replaces the original attack for so long as Heatseeker is below 5000 HP, the Shotgun cannon will start firing very quickly, firing two bullets at a time across its very large spread. The bullet has a 20% chance to be small, 30% chance to be medium, and 50% chance to be big. It stops this attack once 22 bullets have been fired.
 * Phage Squad II: Replaces the original attack for so long as Heatseeker is below 5000 HP, each Phage Spawner will summon two types of each Phage type this boss can summon. The Phages will also always spawn under the effects of Afterburner.

Trivia

 * Like Nonation, but a completely different fighting style.