The goblin brings out a finely carved obsidian bowl and a roll of parchment, both of which he sets on the low table between them. At his direction, Harry holds out his hand. Griphook pricks his finger with a needle and guides his hand to let the blood drip into the bowl. Harry counts seven drops, before the goblin lets him go. While he heals the small pinprick, Griphook chants over the bowl. The carved goblin runes that criss-cross the obsidian light up as if on fire. Words begin to appear on the parchment sitting beside it, written in Harry’s own blood.