Themus the Living Prophecy

Themus costs X less to cast, where X is the
greatest power among creatures you control.
Whenever an Enchantment enters the battlefield
under your control, you may either gain four life
or create a 1/1 white Human creature token.
{1}{g/w}, {t}: Put target noncrearure spell from your graveyard on top of your library.
Rebirth - 3{w}{u}{g}, 5