Oh Rats

Create X 1/1 black Rat creature tokens with
"This creature gets +1/+0 for each other creature
you control named Rat."
"They come swiftly in the night, gnawing on the bones
of their past victims on their way to their next target.
If you hear them, it's too late and you can only say
"Oh rats!" before being devoured. In this TED Talk, I
will discuss..."