While challenger decks, and in particular Pirate typal decks, may be better suited for Ruby/Steel, this color combination offers some great item synergy and card draw that will help keep you from running out of resources.
The longer you read and digest what it actually does, the more broken it seems
Minimus Containment is like Imprisoned in the Moon or Darksteel Mutation, but without the feel-bads
However, it also puts a +1/+1 counter on each creature you save, which might not seem like a major boon, but when you think about the rest of the table losing their creatures, and yours are better than ever
How do I fix artwork that looks zoomed or off-center
Introducing Lier, Disciple of the Drowned: Lier looks quite powerful, but what kinds of decks would it be run in