The Core, Souls of the Past

Whenever The Core, Souls of the Past enters
the battlefield, flip the top card of the Core
deck.
{t}: Add one mana of any color.
{2}{t}: Flip the top card of the Core deck.
{4}{t}: Search your library for an aura or equipment
card, add it to your hand, then shuffle.
The Core, Soul of the Past can be your commander