Marrow-Gnawer

All Rats have fear. (They can't be blocked except
by artifact creatues 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.

"There are many mysteries around us. You must
be patient if you wish to discover them."
—M. Rasmodius