Slutty Rat Wizard

Toxic 1 , Haste
Whenever Slutty Rat Wizard attacks, look at the top
four cards of your library. You may put any number
of Rat cards among them onto the battlefield. Put
the rest on the bottom of your library in a random
order.
{b}{1}, Sacrifice a Rat: Creatures you control gain
Toxic 1 and Haste until end of turn. Proliferate.