Waste Processor

{1}: Each player puts the top card of their graveyard onto the bottom of their library. For each player that does, put a +1/+1 counter on Waste Processor and gain 1 life.
{2}{g}: Waste processor becomes a 0/0 Green Ooze creature with Deathtouch until end of turn. If damage would be dealt to it this turn, instead remove that many +1/+1 counters.
{5}{g}: Put a random card from your graveyard into your hand.