What determines whether a unit can be converted by a "binding" attack like the deceiver's spell? Just being not undead does not work. I tried to figure out other tasks myself, but I have absolutely no idea how it works.
In its object tag, the unit must be vulnerable to Confusion-type attacks. I think it has to take 100% confusion damage for the binding dream to work (myrk giant is .3 or something and it can't be bound).
You also need to place that monster type on the right team in Loathing for the conversion to work. That is, if deceiver is team 0, and a myrk is team 1, in order to convert the myrk, you need to add a myrk to team 0 in Loathing.
Ok, one more: what determines whether a unit dies when healed (like thrall)? The 'undead' and 'cannot be healed' flags do not seem to work (both are disabled for thralls).