Tale of Diep:Final Sons

The Final Sons... the last ones to rule them all, don't believe the one of five mouths..., as his tongues writhe with lies. Conceived in the last hours before his sealing, Panzer created five very powerful entities who would be put into slumber until the time was right. And that time is now. Twenty days before at last he is free, the Final Sons have woken from their millennia-spanning dormancy.

It is under the assumption nothing will stop them.

This is revelation...

Final Sons

 * The Harbinger
 * The Warhand
 * The Pestilent
 * The Siphon

Trivia

 * All of them are based around the Four Horsemen of the Apocalypse, as described in the Book of Revelations in the Bible.
 * This reference was made because in the Book of Revelations, it details what will happen when Rapture, the return of Jesus Christ, occurs. This is similar to Panzer being freed in essence, just... he's malicious. The arrival of the four horsemen is one of these events.
 * They themselves are kind of between Gladiator Bosses and Mega Bosses in difficulty.
 * Spawn in Mega Fortresses.