A wildcards workflow allows ComfyUi to generate prompts with random elements present in various txt files. For example if in your prompt you add Female-Hairdo inside two underscores before and two after the term, a random hairdo will be fetched for each image generation. But if the file Female-Hairdo.txt is not present in the correct folder, it won't work. You can add as many wildcards you want in the prompts. The correct wildcards folder for this workflow is ComfyUI\ComfyUI\custom_nodes\comfyui-dynamicprompts\wildcards

***TXT Wildcards to download can be found on CivitAi and other places. (this is not for .yaml files)

You can also create your own wildcards files. It's easy. You write the word or phrase and hit return, repeat for all the terms you add and save as .txt in the correct folder. Once you reopen Comfy it will be operational. You can also have fully crafted prompts inside a single wildcards file.

***You must leave Batch at 1, it is in the RUN box that you input the number of images to create so that the generation can get a different prompt at a time.

***Of course you must install all the missing nodes if any. If you get an error, make sure you have the Impact Pack extension installed, and also the ComfyUi_ADV_CLIP_emb extension.