RTF is a global modification that replaces all towns in the game.

lizards, version one, I think I'll rename the gnoll berserker to something else (raider or rogue would be fine), and call the lizard upgrade a berserker.

They look good, but I think the helmet doesn't quite fit the upgrade. It's a bit too bulky.

Added 1 minute ago
They could have something in an Aztec style. For example, like the mask of the snow walkers (from Heroes 6).