Devouring Sludge

Devour 4 (As this creature comes int play, you may
sacrifice any number of creatures. This creature comes
into play with four times that many +1/+1 counters.
Sacrifice a creature: Put a +1/+1 counter on this
creature and regenerate it.
His appetite? Infinite. His metabolism? Immediate.
His bowel reaction speed?? A little TOO fast...