The Scuttling Thing

Haste
{3}{b}{b}: At the start of your upkeep if The
Scuttling Thing is in your graveyard you
may play it onto your battlefield.
If The Scuttling Thing destroys a creature you
gain lifeequal to destroyed creature's toughness,
and The Scuttling Thing gains a +1/+1.
If The Scuttling Thing leaves your battlefield
you lose life equal its Toughness.