Kraken's (giant squid's) ink

The ink of a kraken, or giant squid, is the base of magical ink. Seven fluid drams of it with a dram each of powdered gall oak and gold yield enough ink to inscribe up to 7 spells, and every scroll requires such ink. The finished ink must be kept in crystal vessels or its magic fades, and a 7 dr. batch can sell for 700-1000 G.P. The raw ink costs 100 G.P. per dram.