Imagination

If imagination is in the command zone, you may
pay {w}{w}{u}{u}{b}{b}{r}{r}{g}{g} at the beginning of
your upkeep. If you do, search your library for a legendary card of each color, exile them, then
shuffle your library. Until end of turn you may
play those cards without paying their mana costs.
We all have it, it just needs a little push.