If you have age of undeath taken for abomination and switch zones with the minion summoned, it resets and no longer tracks what minion was consumed for its creation, so things like arrow nova/double strike/devouring souls are no longer being casted, theres also a confirmation of this by its apearance changing depending on what “upgrades” its supposed to have.
We can see mage, archer and warrior being included in the model at the time of summon: https://imgur.com/a/gQ2qlRg
And here we see it no longer having the minions attached to it after changing zones: https://imgur.com/a/sTuCUjp