I put an unupgraded one into a generic anti-fg ccyb I was playing (too many 'if I had one more card in my deck I would've won' moments lately), and so far it's worked like a charm. As far as I can tell, it's been the deciding factor in at least two games, due in part to being invulnerable to PC. The only downside is that it's useless against mass CC, since the very placement of the card seems to warrant a rain of fire from false gods without any large groups of creatures in play.