[Jack_Trowell]

Try lycanthopos amulet : the commander will go berserk and be killed by the first indy province you send him to, and thanks to regen he will be much less likely to get an affliction.

And best of all, the twiceborn will make sure that the "curse" of the amulet is removed (all items are lost with the death of the commander, and even if you were unlucky to transform into a werewolf, the previously casted twiceborn should remedy to that)

Of course this will add some natures gem to the transformation ...