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

The ebony harpy turned out great, my respects. Are you planning to make a goblin girl/gremlin girl?

Do you mean goblin/gremlin girls? No, I didn't plan to.

Added 1 minute ago
Next, I'll make skeletal infantry for Tier 3.

Also, I wanted to create large alpha monsters for Tier 4, with a deer or wolf skull.