Planar Discovery

Link — Reveal the top X cards of your library,
where X is equal to the number of cards in your
hand. You may put a colored card with mana
value X or less from among cards revealed this
way into your hand. Then put the rest on the
bottom of your library in a random order. If
Planar Discovery shares a color with the last spell
cast this turn, search your library for a colored
card with mana value X or less and put it into
your hand instead. Then shuffle.
Flashback {5}{w}{u}