Crazed Meth-Goblin

Flash, Unblockable
When Crazed Meth-Goblin attacks, return it
to your hand unless you put a -1/-1 counter on
it.
When Crazed Meth-Goblin leaves the
battlefield, divide all -1/-1 counters on it
between all other creatures.
What is tha... WHERE DID IT GO?!
-Mazzic Thimble, Master Lookout.