Prismatic Fish

Description
Taking this to the Night Market can reward one of the following choices:
 * +1 Firesilk
 * +1 Portal Scroll
 * +1 Four Leaf Clover
 * +1 Spirit Taffy
 * +1 Salty Jawbreaker

Acquired
Can be obtained as loot from a dead adventurer in the Overworld. It's possible that can be obtained from other world encounters as well.