Deadshot Corpse

Deadshot Corpse's power and toughness are
equal to the number of Cowboy creatures in
your graveyard.
{b}{b}{b}{b}, {t}: Deadshot Corpse deals 4 damage
to target creature. If that creature would die this
turn, discard a card and you lose 4 life.
"I've seen horrors on this scorched earth. But you...
you take the cake."
-Tom Horn