Sandar, Ghoulish Shadow

Zombies, Yetis, and Werewolves are
Sandar, Ghoulish Shadow's Prefered.
This creature costs {1} less to cast for each
Prefered you control and Prefered you control
cost {1} less to cast and have Death-Touch and Lifelink.
{b}{b}: Search your library or graveyard for a
Prefered, then shuffle your libary and
put it on top of it.