It was said that the King fell from grace so abruptly that the earth opened up beneath his citadel so he could fall for eternity. This is exactly what happened...
Down it falls, a great concentric castle of dark stone. Cracked and broken, though upright, pieces large and small fall together in concert, frequently dashing against each other, or drawing apart to create wide gulfs to expose the hungry blackness below.
And in this tumbling castle, there sits a king, his head heavy with his crown, his hands clutching his throne in unending terror.
The fort seemed like every small boys dream, but in fact it was a very well made magical prison, and the young prince only learned the truth when it was too late and the magic sucked him inside, his cries from his now inch high body too quiet to be heard.
Pcs learn of high power magics that allow them to banish weapons and suits of armor to some 'elsewhere' place until such time as they need it. reduces encumberances, gets fewer questions, and when the PCs get jumped by thieves in the ally, they can summon their suits of full plate armor with weapons drawn.
Lesser powers would allow them to summon their weapons from another physical place, drawing them to their hands like Luke skywalker summoning his lightsaber on Hoth.