Riders of the Nine

{2}{b}, {t}: Target creature gets -X/-X until end
of turn, where X is the number of Wraiths you
control. Search your library for a Wraith card,
put it into your hand, then shuffle.
Each opponent's maximum hand size is seven
minus the number of Wraiths you control.
A deck can have up to nine cards named Riders
of the Nine.