How about a new Passive Skill; Mechanical. Could be switched to something that sounds cooler. Anyways;
Result of being Mechanical;
Mechanical creatures can not be lobotomized (no brain), mutated (no genes), blessed (no spirit), nor poisoned (really?). Mechanical creatures are given an additional one damage when hit with fire CC (melting metal) and twice the damage when hit with electric-type CC (think Lightning Storm etc.).
Possibly more or less than what is stated above.
So a few that immediately come to mind that would become Mechanical are the following;
- Armagio
- Graviton Mercenary
- All flying weapons
- Deja Vu?
- Steam Machine
Here are a few fun ideas
(fun. please don't comment on the balancing of the cards themselves unless it specifically relates to it being mechanical) I came up with while working with "Mechanical"