Hi there! *waves* Is there only one secret world? The one for Inphyy? Or is there more than one? I haven't been able to beat the King of Nights...<< I can't find that freaking armband...I've fought the armies of night but I haven't got it...anyway, ^^ yeah...that's it XD

Only one secret world, only for Inphyy.

its imposible to beat down the king of nights,even with the armbrand i got it and i simply can beat it,he kill me with tree shots ,someone have an strategy or something??

I feel you pain Neonum, i only just beat this guy last night.
To make it easy you need to be prepared, Imphyy needs to have the following:

Equip the Deadly Armband
Level 9 which unlocks the Seraph Butterfly (A,A,Y)
The best sword you can equip
Equip any items that boast strength & critical

During the fight boost your red orb to the max and keep attack the king only when he is not the ground (he swaps between hover and ground). The king will only take significant damage from the Seraph Butterfly when he is walking and not hovering.
It takes about 6-7 hits to kill him.

U need to get imphys Level nine weapon in oder to beat the king og nights

This how u get it on Euvarria Mountains you hace to get a S-rank to get the weapon along with the armband