Generic high-fantasy setting (d&d 5e if you want to use specific spells), what security or defences would mages use to secure the place where they keep all their magical stuff? I'm thinking decoys, reinforced and hidden location, guards (hired or summoned), locks (both magical and mundane), booby traps, and spells to discourage or confuse passing snoopers.

Also it's going to vary depending on the resources of the wizard and of the players. Is this an independent student wizard protecting their studies that a low-level party could reasonably break into, or is it the king's secure vault of confiscated magical horrors that's a final boss for the campaign?

I'm looking for ideas for fun obstacles, and critically that the players can't just sidestep with a single low-level spell!

Generic high-fantasy setting (d&d 5e if you want to use specific spells), what security or defences would mages use to secure the place where they keep all their magical stuff? I'm thinking decoys, reinforced and hidden location, guards (hired or summoned), locks (both magical and mundane), booby traps, and spells to discourage or confuse passing snoopers.

Also it's going to vary depending on the resources of the wizard and of the players. Is this an independent student wizard protecting their studies that a low-level party could reasonably break into, or is it the king's secure vault of confiscated magical horrors that's a final boss for the campaign?

I'm looking for ideas for fun obstacles, and critically that the players can't just sidestep with a single low-level spell!

Lead lined chamber underground, accessible only through a small teleport-only entryway guarded by golems.

The access to the wizard's vault is an escape room themed after the wizard's life that the players learn of through advertising flyers.

The players will have to decipher clues placed in and outside the room, or interview NPCs, to determine useful facts about the wizard to solve the puzzles (names / # of siblings, favourite pet, first love, best friend's sister's name, etc.) - vary complexity / difficulty of research as needed. The wizard doesn't care if they get in the vault; the wizard wants fame, entertainment, or are appeasing a deal with some entity.

Some puzzles may have lethal/deadly penalties - but really fun ones, like having to reach into a hole for a key, object, or to pick a lock, and it exchanges that limb for that of a fire elemental with no inherent protection from fire given to the rest of the body (temporary or permanent as level dictates); a failed puzzle guess results in a suggestion that elf blood will definitely open this lock (it doesn't, but that must mean you need more, right?); or, just a bunch of dead bats that get dumped on them that later get animated from the dead or spider swarms explode from the corpses after 3 rounds (ghast bat swarm?).

Rooms that fill with water/lava/acid/rum/spikes are always fun. A book just filled with exploding runes in a variety of languages or that is in code and needs to be decoded first before they explode, each explosion larger than the last (book is always unharmed). Intermittent anti-magic zones (spells on even rounds only, temporarily for certain puzzles, spells create random effect of same level from an opposition school, etc.). They repeatedly find clues that point towards a need to kiss (escalate vigor and technique each time, require a certain number of spectators be rounded up, etc.) a statue in the town square, which has no apparent effect.

He re-stocks the vault often by hiring successful invaders for fun adventures that never require morally suspect behaviour of any sort.

If this a high fantasy setting where magic practice is common, then… I would pitch that like a modern day researcher might have very specialised domain knowledge they would most likely lack a deep understanding of security best practices but being aware of this would contact some external org to monitor and implement security for their lab.

They would likely need to present multiple factors to access it (something they have, are and know) eg when the lab is not in use it is folded into a pendant that the wizard carries with her at all times (something they have). To open the lab the dials on the pendant must be set to the correct positions (something they know) and the wizard must blow her breath (something they are) through the revealed channel, the only the person blowing and up to three willing people of her choice that she can see are then transported to the lab.

Tampering or unauthorised access countermeasures should be such that they minimise further exposure. Eg killing/hurting someone who has incorrectly set the dials is not the best strategy as the pendant is still out of the possession of the wizard. Instead maybe setting the dials incorrectly teleports the pendant back into the wizards pocket or, if teleportation is blocked, renders it inert until another physical factor is presented eg it is reset using the original workbench (at the security contractor’s offices) where it was made. Similarly if the wrong person’s breath is blown through the pendant then the person blowing is not transported into lab but to a random place on the same plane.

The wizard should be alerted to any possible unauthorised access so if the pendant is removed from their person or if the wrong dials or breath are used. Further access could require further authentication if it occurs in an unusual place or at an unusual time.

The vulnerability of the wizards security would then not be technical but human. Instead of trying to find the gaps in a diy security implementation the wizard has probably got frustrated with the multiple layers of security and self sabotaged things for convenience. Eg locked all but one dial in its correct setting so only one needs to be set each time; added an enchantment so that when the pendant is blown an illusion of the same time and place is projected to prevent further challenges; maybe even disabling alerts and counter measures since she has a pet that keeps stealing/fiddling with her pendant. The company that provides the security package might be aware of the hacks the wizard is using and could be in an ongoing argument with her, threatening to withdraw their services unless she stops bypassing security measures.

• Weirdly the lab isn't secured but it's a real mess. However, the wizard being paranoid, they bring their job at home,.

• The good old paperwork nightmare sorry you need a pass A38 to enter

• A thrash but fun one, all the notes are tattooed on the back of "slaves", if the players broke in by force, the slave would immediately escape, scattering the note in the city

Generic high-fantasy setting (d&d 5e if you want to use specific spells), what security or defences would mages use to secure the place where they keep all their magical stuff? I'm thinking decoys, reinforced and hidden location, guards (hired or summoned), locks (both magical and mundane), booby traps, and spells to discourage or confuse passing snoopers.

Also it's going to vary depending on the resources of the wizard and of the players. Is this an independent student wizard protecting their studies that a low-level party could reasonably break into, or is it the king's secure vault of confiscated magical horrors that's a final boss for the campaign?

I'm looking for ideas for fun obstacles, and critically that the players can't just sidestep with a single low-level spell!

Generic high-fantasy setting (d&d 5e if you want to use specific spells), what security or defences would mages use to secure the place where they keep all their magical stuff? I'm thinking decoys, reinforced and hidden location, guards (hired or summoned), locks (both magical and mundane), booby traps, and spells to discourage or confuse passing snoopers.

Also it's going to vary depending on the resources of the wizard and of the players. Is this an independent student wizard protecting their studies that a low-level party could reasonably break into, or is it the king's secure vault of confiscated magical horrors that's a final boss for the campaign?

I'm looking for ideas for fun obstacles, and critically that the players can't just sidestep with a single low-level spell!

I play d&d to escape this kind of thing, lol

Seriously though, using real-world computer security is a great idea!

Honestly, if I were a high-level caster in DnD setting, I would only use Alarm. What could possibly be a better defense than myself? And if I'm not alive to recast the alarm, what do I care for the fate of my lab?

Would probably take inspiration from Marvel with The Collector (I think?) And show them buck wild shit with no defenses at all. If they want to rob someone who puts no locks on a lab full of expirements on undead dragons and crazy artifacts just sitting on tge wall, go for it.

That is the kinda DM I am though lol