Fangs, the Tunneler

Inspired - Whenever Fangs, the Tunneler becomes untapped, you may pay {b}{b}. If you do, put 3 1/1 black Rat creature tokens onto the battlefield.
Rats you control have first strike.
"Somewhere, somehow, a rumor has spread that cats eat rats. That rats are weak. We're... skeptical." - Brig, exterminator of Kessig