Horda Gardia is the final boss of Raiden IV (the real one being Horda Gestorada), and one of the few bosses in the series who has a second form.
Details[]
Phase I[]
Horda Gardia fires from its initial form of a spiked ball. The antennae fire projectiles of various types and angles. Each antennae is guarded by various plates which must be destroyed before the antennae can be destroyed.
When all antennae are destroyed, the next phase begins.
Phase II[]
Horda Gardia reveals itself as a Red Crystal and grows in size. It launches projectiles in various formations, though it lacks as much health as the first phase. In the second loop, the amount of projectiles launched is drastically increased.