Myphitic Blight-hauler

Swampwalk
Foul Stench — Whenever Myphitic Blight-hauler
enter's the battlefield or attacks, you may pay
1 life any number of times. For each 1 life,
place a -1/-1 counter on target creature.
Putrid Explosion — When Myphitic Blight-hauler
dies, each non-black creature gets -3/-3 until
end of turn.