Lonefire, the Perilous Blossom

Draft Lonefire, the Perilous Blossom face up.
As you draft a creature card, you may reveal it,
note its color, then turn Lonefire, the Perilous
Blossom face down.
Sacrifice Lonefire: Search your library for a
creature of the color you noted, put it onto
the battlefield, then shuffle your library. You
lose life equal to the converted mana cost of
that creature.