The Gamble Era covers Season 6 and Season 7, when Sera Gamble took over showrunner duties from Eric Kripke. The two seasons introduce loosely-related arcs as opposed to the Kripke Era, but both deal with the power vacuum left by the averted Apocalypse, and the collective rise of monsters to prominence. The former season begins a year from the aftermath of the Apocalypse, but also explains what happened in the interim. It featured a three-way power struggle between Heaven, Hell, and a new major supernatural dimension, Purgatory. The latter introduces a drastic change in the balance of power as Castiel declares himself the new God, and with the arrival of new powerful beings referred to as the Old Ones from Purgatory.