1) Open the skull cave.
2) Wait for maximum luck.
3) Craft a +luck dish (if possible).
4) Craft ladders (because from personal experience on the lower floors more mobs) and farm mobs. (This way was able to get 7 rainbow shards in a day).
Well, if you have a skull cave is not open, here is a list of those from whom the shard falls:
In addition, rainbow shard can fall from: omnigeode, iridium deposits, arcane stones, gem deposits, and treasure chests. A fish pond with rainbow trout can produce it (BUT ONLY WITH 9 FISH IN THE PORT!).
So far, both games are in the early stages of development.
The success of the title is quite expected.
New heroes, new challenges.
Deadpool's world is dying.