Nitramene

{2}{r}: Sacrifice Nitramene, Destroy target land
"Just a piece of paper... My formula for molecular nitramene. Technically, we're not even sure it works,
but, well, let's face it... I invented it, so it works. If
that stuff were ever fabricated..."
"Boom?"
"This much would level a city block. And I'm not
talking the short ones. Avenues."