If I control a Brain in a Jar with zero counters on it and activate its first ability, then while maintaining priority sacrifice it to Arcbound Ravager, am I able to cast a Hypergenesis (zero CMC sorcery) on resolution?
http://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=410017
http://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=370510
http://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=113533