Ishmi's Dollhouse

Ishmi's Dollhouse enters the battlefield tapped.
{t}: Add {w} or {r} to your mana pool.
{3}{r}, {t}: Search your library for a Demon creature and put it on the battlefield with X -1/-1 counters, where X is that creature's toughness minus one. Shuffle your library.
{1}{r}: Remove a -1/-1 counter from target Demon.