Tian-Po's Tome of Knowledge

When Tian-Po's Tome of Knowledge enters
the battlefield, put X page counters on it.
{x}, where X is the number of page counters
on it or less, {t}, Sacrifice Tian-Po's Tome
of Knowledge: Draw X cards.

“However, before leaving, I took some books
and records of the late Count Amrok from there”
—Douglas Bryan, “Give Me Back My Youth!”