Hive of Races

Hello everyone. What if we created something unlike anything else, something special, something... for example, a completely mechanical race? Give them immunity to hypnosis, diseases, curses, poison, etc., but make them vulnerable to scythe attacks. Imagine: fearless, obedient, unpretentious mechanical warriors who know no hunger or fatigue, relentlessly pursuing their assigned goals... Heroes-mechanics, or let's say, inventors. On the adventure map, they could create new warriors (depending on their level). To hire mechanical units, it wouldn't require gold, but rather ore, wood, or resources (mercury for level 7). Gold would only be used for building cities and exchanging it for the necessary resources, and to create buildings in cities where more profitable exchanges could be made. Some of the units could fight on the battlefield, and if some of them are left in mines, they would increase the production of the necessary resources. Units, approximately like this: Upgrades could be divided like this: bronze/steel/and let's say, alloyed. Level 1 - Scout (weak, but very fast) Level 2 - Miner (mines ore, gold, crystals; except for mercury and wood; can move across the battlefield in an arc and grab enemies along the way, similar to alt-griffons) Level 3 - Mechanical Archer (in siege mode, attacks without range penalty, but does not retaliate in melee combat) Level 4 - Lumberjack (a unit left in a sawmill increases wood production) Level 5 - Combat Robot-Fighter (the backbone of the army) Level 6 - Flamethrowers (shoots, leaves a wall of fire; in melee combat, like dragon's fire breath; can detonate upon destruction) Level 7 - Fluid Metal/Mercury Fighter (a small creature, ignores armor (penetrates it), ignores obstacles (can pass through city gates), regenerates (even from a puddle of metal if the battle is not finished within 2 turns after its "deformation"), can dodge attacks (like the miss of Necropolis ghosts). So, what do you think? I have some preliminary ideas about their appearance. P.S. I am open to criticism.