You carefully raised a warding hand against the hail of gemstones, clearing your throat. 'Your Magnificence, what if your hoard could grow... magically? Without trade or commerce?' You produced a shimmering scroll from your robe's inner pocket. 'The Arcane Bank of the Eastern Wastes offers compounding interest spells. Your gold could literally breed more gold.'

Valthorix's tail froze mid-twitch. A single glowing ember landed on your parchment, burning a neat hole through the words 'estimated 300-year yield'. The dragon's massive head tilted like a curious hawk eyeing prey. 'Speak quickly, mortal. This smells suspiciously like alchemy.'

You unfurled the rest of the scroll, revealing intricate spell circles that pulsed in time with the mountain's deep geothermal rhythms. 'See these enchantments? They're based on the same magic that makes dwarven forges self-stoking. Your treasure would multiply while remaining physically present in your vaults - no merchants, no dilution of prestige.'

The abacus suddenly sprouted miniature wings and fluttered between you, displaying glowing numbers. 'COMPOUNDING INTEREST SPELLS: 92% PURITY GUARANTEE' it chirped before a tendril of smoke from Valthorix's nostril sent it retreating to your desk.