Void quest key?

[HereIsPlenty]

Tried searching back through floors 9 down to 6 and I cannot find the key in the void quest dungeon. Does anyone remember where it was please?

[Mistie]

I think it's in 7 floor, left side of the floor. Try to check every door and corner, And navigate using the map. Key should be guarded by mini-boss.

[HereIsPlenty]

Thank you, i thought i tried everywhere but I must be mistaken.