Manus, Metatextual Mage

If you cast Manus, Metatextual Mage from
your commander space, you may activate the
following: Once per game during a main phase,
you may search your library for a historic spell.
Add it to your hand, then shuffle.
{x},{t}: Draw equal to {x}. Add cards with
flavor text to your hand and exile the rest.
"If there were any justice in this world,
I would be an Unhinged-- and yet,
here we are!"—Manus Farbank
—Manus