Marrow-Gnawer

Rat creatures have fear.
(They can't be blocked except by artifact creatures and/or black creatures.)
{t} Sacrifice a Rat: Create X 1/1 black Rat creature tokens, where X
is the number of Rats you control.
Marrow-Gnawer united three nezumi gangs when he slew their leaders in a single night. Now they call him their first lord.