Book of Thoth

You permanently gain 10 Mana per Stack, and receive 1 Stack per 900 Damage Dealt to minions and Jungle Monsters, with damage to Gods counting double. You gain Intelligence equal to 4% of your Mana from items. At 50 stacks this item Evolves, gaining 20 Intelligence, 100 Mana, and increasing the Intelligence gained from Mana to 6%.