What Did Dumbledore See When Drinking The Potion?

What Did Dumbledore See When Drinking The Potion? Dumbledore seemed to have terrible nightmares or visions, and was almost too weak to stand up after drinking the potion. Kreacher said that when Voldemort forced him to drink the emerald potion his “insides burned” and he saw “terrible things” (DH10). … Sirius told Harry that Regulus