[AreaOfEffect]

That's not really an exploit since it takes several turns to regain the ability to make a new prophet and then kill off your commader again. It also isn't free as it costs 15 gems every time. Third, in all that wasted time it is very likely that your commader will drop off the hall of fame list.

There are also much easier ways to make high level preists in combat. Communion being the best. Just prophetize any astral or blood mage.