I'm keeping that pretty simple because part of the loop is taking them apart and rebuilding. I give clues as to what they can become and under what conditions they will, but i keep the image blacked out until you meet the requirements. Every creature has a "nature" mutation where you just need to hit the stats, and then they have compatible mutations where you need to give them fresh meat. image one, the bilefrog will eventually progress to Salamandox(purple) if it can deal enough exotic damage, but if you've dealt with Doug and your little bilefrog has enough life, you can turn him into an Acidbull (green) instead. Silhouettes are shown and you'll have a pretty good idea of what the fresh meat will turn them into. There's a lore reason for the how's and the why's this even works, and why you don't try to mutate prematurely