This is Ignis' domain. Ignis is a boss, and you cannot compare him to anything.
He will make you scared, sick, your heart will beat like crazy when you are around him.
Even to reach him, you will have to pass through several obstructures.
That is why we highly recommended you great armouring, because else you will not survive, no exceptions.
But where do we need to go to?
x690 z2000, correct this is in the PvP area, though in Ignis' domain you cannot PvP.
To go through Ignis' domain, you will need a friend, since this is co-op. (both need to stand on the pressure plates)
I wish you all good luck and I hope you will find the light in the dark.
Side-note: Ignis respawns every hour