Sulfur Merging and Frog Properties

If two baby sulfur slimes are near each other, you can "breed" them (feed them sulfur or smth idk), they merge back into the original form. To balance this there can be a new variant of "merged sulfur cubes" with a new design so we can differentiate them, and they can no longer drop XP or any drops to balance it out. And since sulfur lights exist we can add a brand new species of frog or make use of the existing three and make them eat sulfur cubes to make those new lights.