Complex sentence: Sometimes, players may come across bombs, which destroy all of the candies of the color it is placed on, or a random, color-changing candy, which becomes a certain color after being set down.
Split into simpler sentences: Sometimes, players may come across bombs, which destroy all of the candies of the color it is placed on. Other times, players may encounter a random, color-changing candy, which becomes a certain color after being set down.