Fumulus, the Infestation 
Legendary Creature — Vampire Insect
Flying, deathtouch Whenever a player sacrifices a nontoken creature, create a 1/1 black Insect creature token with flying. Whenever an Insect, Leech, Slug, or Worm you control attacks, defending player loses 1 life and you gain 1 life.
Legality
standardNOT LEGALpioneerNOT LEGALmodernNOT LEGALlegacyLEGALvintageLEGALcommanderLEGAL