Can normal army take out Sphinx pretender?

[sushiboat]

Given that the Sphinx is an Astral mage, is an autokill scenario anything more than a longshot? The idea is that the Sphinx paralyzes some attackers but cannot kill them, all attackers except the paralyzed retreat, the turn limit passes, and everyone remaining, including the Sphinx, is autokilled.

I guess the simple answer to the original question is no, don't even think about it with the army you described.