Corpse Puppeteer

Whenever a creature leaves the battlefield, you may put a -1/-1 counter on Corpse Puppeteer, if you do, Corpse Puppeteer becomes a copy of that creature,
it keeps this ability and is still a Zombie Ooze
"Verda, is that you, what... what happened to
you? ...Verda?"
-- Gale, Knight of Ashira