Kael,
I'm playing the Luchuirp in my map/scenarii and i feel surprised with one upgrade.
I'm rich (around 2000 gold, as i miss 3 wonders for a few turns

) and i have just discovered construction tech. So, i built Sculptor Studios in all my cities and began to build some wood golems. I also decided to upgrade some units with such an mount of cash...
1) All my wood golem were built with no xp. That point is logical.
2) As a Runes follower, i decided to upgrade some of my best warriors (those with many xp) to dwarven soldiers. They were upgraded to wood golem !!!
How can a living unit be upgraded to a mechanical one ?

Not very logical.
Furthemore, they were upgraded with all the promo of my warriors.
I let you imagine that my army was very strong. My poor neighbor (Calabim) will have his ash seriouly kicked with such an army....
I suppose that you already know that. If not, now you know !
The (golem) Frog