History of the Humanity

(If a human creature under your control were to go
to the graveyard on any turn, instead attach it face
down under this knowledge. Each card placed this
way counts as one page).
•1-5 pages: It costs you {1} less to cast human
creature cards.
•6-10 pages: All your human creatures gain+1/+1
•+10 pages: All your human creatures gain
vigilance.