D&D 5E Ideas for impossible/intangible theft list.

[Tales and Chronicles]

I'm in the process of preparing for my next PotA campaign set in the Nentir Vale and I just received some of the players Pcs. I'm now working on some specific quests for them.
One asked to play a blacksmith Tiefling Champion, whose daughter is on the run. My jaw dropped when I saw this backstory: his daughter will be Vanifer, the prophet of Fire.

Another Pc will be a halfling fey-lock with a who made a pact with the King of Cat, in exchange for supernatural theiving skills. In exchange, the Pc will have to steal a list of items/concepts and bring them back to and old eladrin ruins. I'd like to hear if any of you has any idea on interesting ''intangible theft''.
For now I have:
The beard of a Dwarven king who-never-was (the stone beard of the statue of the fake tomb of Belsimer's king)
The ugliest angel in all creation (An hunchback, pox-scarred caretaker of Harken's clocktower named Angelius)
The lost hope of Dwarkind (a map of fallen Belsimer)

 

[transtemporal]

The blood of a stone
The heart of the ocean
The entrails of a ghost
The virtue of an evil man
The sands of time
The shadow of a shadow
The light that casts no shadow
The light of a black hole

That last one was actually in an RPG I played in. Turned out to be easier than we thought!

 

[Saeviomagy]

The light of a black hole

That last one was actually in an RPG I played in. Turned out to be easier than we thought!

Well, yeah, since a quasar is just about the brightest thing around...

"The name of the unnamed/unnameable" - find the true name of some powerful foe OR be the first to name something that previously did not have a name.

 

[Mad_Jack]

Stealing immortality...

Simple version - steal a monument to someone or something...

Complicated version - Discredit some legendary figure/event/place/ etc. by proving that he/she/it was not what people think...

 

[Tales and Chronicles]

Wow, thanks a lot. Keep'em coming!

 

[Chaosmancer]

If you've got time to watch a show, Jing the Bandit King is an anime essentially based off of this idea.

So, for example (if memory serves), he steals an empress's smile and the hour of 9 o'clock.

You could also go off some old legends, the Norse legends claim that to create the chain that bound Fenrir they needed a few things like: The roots of rocks, the beards of women, the legs of snakes, the sound of a cat's step, ect


Random list of other ideas:

The purple of the setting sun
The thread of fate
The last wish of a dying man
the sparkle of a maiden's heart
the scent of lavender
the voice of a mute
a miser's generosity
the song of the stars
The fear of a king
The first words of a baby

ect ect,

They mostly end up being riddles, unless he can literally steal things like that

 

[Leatherhead]

A song that has never been written.

A river.

 

[transtemporal]

Well, yeah, since a quasar is just about the brightest thing around...

A quasar is one of the possible outcomes of a collapsing star, but I don't think it's quite a black hole is it?

 

[jaelis]

Your nose

 

[Saeviomagy]

A quasar is one of the possible outcomes of a collapsing star, but I don't think it's quite a black hole is it?

Well, we're pretty sure that they're the accretion disk of super massive black holes.