Whenever another artifact or creature you control is put into a graveyard from the battlefield, put an oil counter on Vat of Rebirth.
![2](/Handlers/Image.ashx?size=small&name=2&type=symbol)
![Black](/Handlers/Image.ashx?size=small&name=B&type=symbol)
,
![Tap](/Handlers/Image.ashx?size=small&name=tap&type=symbol)
, Remove four oil counters from Vat of Rebirth: Return target creature card from your graveyard to the battlefield. Activate only as a sorcery.