Piecemeal

Whenever an opponent attacks with one or more creatures, put a -1/-1 counter on each creatures attacking you.

When you put a -1/-1 counter on a creature an opponent controls, that creature's owner creates a Flesh token.

{1}{b}, {t}: Proliferate

"Inside, lying was a black cardboard box, full of cotton wool and a single severed finger." - Lee Rentoul