The three coins were golden in color. In essence, they were metal currency forged from Demon Gold produced during the Third Epoch. It's just that unlike ordinary Demon Gold, these coins possessed a Whisper Element.
This was a rather famous relic, and in Luvia's opinion, the most numerous currency-type relic still in existence. Apart from the properties of Demon Gold itself—that it was forged from souls and would inevitably deepen the corruption of one's soul when used—the Whisper Element gave these coins additional characteristics.
Each Demon Coin, paired with the most basic Spirit Summoning ritual, could summon a Demon. The quality of the summoned Demon varied according to the number of coins used. And as long as the Demon Coins used for the summoning were not lost, their power could be used to enslave the summoned Demon. But once the coins fell into the Demon's hands, it would gain complete freedom.
Of course, fewer than ten coins could at most summon lesser Demons. Such a small number of coins was completely useless to the Doctor, so he left them to Shade. As it happened, Shade had always needed large quantities of special currency.
Among the items the Demon had agreed to let Shade choose one from six, the information related to Desire had already been reclaimed by Desire itself. The remaining five were all stored inside the mirror.
The first thing Shade took out was a white bone ring with elderflowers carved into its band. The moment the Document Level Relic Elixir of Longevity Ring appeared, the cat's eyes lit up, and it immediately pounced toward Shade's fingers.
But Shade had long been prepared for this cat. When he heard about the ring's effects, he had guessed that his cat would like it very much:
"It increases lifespan and offsets