Hello everybody I need your help. I know this might look like an absurd question, but...

 How would you magically conceive an object within a set maze, maze in which you have never been (nor you'd never wanna be), in order for the concealment to be absolutely random, so that nobody will ever be able to squeeze infos about the position out of you, in any way?

Of course any slight modification of any known spell would be allowed for this very purpose.

Maybe the maze shifts itself every day or so, so that the object is never in the same place? 

I didn't want to have anything like in The Cube movie (even tough I always found it very fascinating...) since the dungeon itself is very simply structured: an underground set of rooms built, collapsed and rebuilt many and many times by different cultures in different eras.
What I wanted to focus is the placement of an object itself within it, not the object nor the dungeon.

Maybe instead of the maze shifting, the object itself shifts positions throughout the maze?

or

Even you don’t know where it will be. Pick 4, 6, or 8 possible positions within the maze that it could be, and when the appropriate time comes, roll a die to determine its location?

I don’t know about this, it’s pretty high level and I’ve never even thought about it before but.....maybe...?  sequester.

Quote from CozmoTheGrey >>

I don’t know about this, it’s pretty high level and I’ve never even thought about it before but.....maybe...?  sequester.

I liked that spell, only problem is that basically you need to bring the target in the said position, touch it and the spell does the rest.
But I need the target to be sent inside the maze, at a random position, from outside the maze, in order for nobody to know the exact location of where it will be, not even the spell caster.

Probably I will use a slightly modified version of this spell, in order to do so.

Thanks for the hint.

Perhaps the object is located on a special Tenser's Floating disk that wanders through the maze like a roomba.

Maybe it's on the boss, an undying monster that forever wanders the area.

Some kind of arcane automaton constructed from the spells Glyph of Warding and Instant Summons?

There is a Glyph inscribed deep in a dungeon or temple. When you place a sapphire in the idol and read the glyph, it completes the Instant Summons spell, destroying the sapphire and calling the macguffin back to the temple, unless the current owner uses powerful magic to protect it (like Forbiddance). The glyph then immediately recasts Instant Summons on the macguffin, so the party can take it, but if they allow any other adventurers to learn the secret of the temple, they will lose possession of it.

Unless it’s a player that’s doing it than you can have the effect be anything. Monsters work different than players. You can just say that there is a specific effect that happens that is unlike any spell in the players handbook. It’s always better not to limit yourself with things like spells. Especially when it comes to dungeons.

There are stories out there about rulers who had designers create great vaults with traps and, after construction, had everyone involved executed so only that ruler knew the vaults' secrets that were taken with the ruler to the grave.

You can have it so that everyone involved with the maze and item are dead. The quest could, then, turn to finding the identity of one of these dead, finding the location of said dead, and asking the spirit Speak with Dead questions through a homebrew spell scroll that compels a spirit to answer truthfully and directly without cryptic speech to learn both the location and the tricks to that labyrinthine vault.

(Something like take the first right, second left, third right, fourth left, and so on... but if the counting is off, one can start over wherever they are and the maze - which is static but still magic - will put them on the right paths as long as they count correctly. Any mistake will lead them in circles and exiting the maze without first reaching the object [but not necessarily taking the object] is impossible. Of course, there would be more tricks along the way.)

(EDIT: What makes the 1st, 2nd, 3rd, etc. difficult is that the path turns without branching. It's the branching that counts, not the path turning. Describing the instances when the path turns left or right without branching can throw people off.)

Speaking of spells, how about Drawmij's instant summons. Essentially, you enchant a diamond so that when crushed it summons the item you chose when you cast the spell. Using a monster (personally an earth elemental rhino seems cool for this) which wanders the dungeon, containing the diamond inside it. So you have to know about the spell and the creature, then find and kill the creature and break the diamond. The actual macguffin item could be in the negative energy plane -- an area so inhospitable to life it is one of the few places containing no creatures but powerful undead.

Edit: go above and beyond with multiple creatures of the same type, so knowing of the creatures is not enough.