Dianoga

Traverse (This card cannot be defended against if the player has untapped Black Biome cards.)
Scavenge {b}{b} (Whenever a Being or Creature card
is sent to either player's Netherworld, pay this cost to
exile the destroyed card and place a +1/+1 counter on
this card.)
"Garbage squids, trash monster, sewage squid, take
your pick on what you want to call a dianoga."