Yin-Yang

Crystallize {b}{r}(When you successfully cast this spell
from your hand, exile it and create a Crystal artifact
token with "{b}{r}, Sacrifice this permanent: You may
cast Yin-Yang from exile for {0} until end of turn.")
If an opponent controls more artifacts than you,
you may search your library for an artifact and
exile it. The same goes for creatures and lands.
Shuffle your library and put the exiled cards on
top of it in any order. If you cast Yin-Yang from
exile, put those cards