Inkheart

Slowly, Thul grew in size in Stahl's hands to about double what it was before, but the most noticable change wasn't just that, but rather what could now be found on its skin.

It was covered in decorative Black Gold, glittering in the light of the Dungeon. With a deep sigh, Eisen rubbed the bridge of his nose and looked at Thul with his mana sight, and to his luck, there wasn't even the tiniest bit of the Inkheart Mana left inside of the Octopus' body. The black gold, a material which confusingly wasn't actually black but still had the regular golden color, didn't have any of that mana in it either, but it was indisputably black gold.

With a sigh, the old man looked at his Grandson with a frown and a light smile as he shook his head. "In the future when you have kids, better try to teach them not to eat random stuff laying around, yeah?" He suggested, and Stahl nodded his head with an embarrassed smile.