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

Right now, I don't know how to make Hydras, so I'm starting to create skins for the heroes. There will be a skin for the Lizard and for the Gnoll; they will differ in textures, paws, and head.

Instead of a Hydra, we can make a feathered serpent, a dragon head, large round eyes, and the tail will be stationary. We'll add insect-like paws, but the wings will be feathered or membranous.

Added 3 minutes later
And I'm also thinking of making a Lizard hero for the Ranger class.