Finding enough ways to bounce the ring to your hand will be a bit difficult, but if you're also willing to sacrifice it and return it from your graveyard, things get a whole lot easier, even in colorless
Im interested in this in numerous decks, not only in Ninjutsu decks, but also in UW blink strategies, and in decks where you have reanimation going on via the combat step
Getting it there is pretty trivial and this has the potential to be incredibly powerful
Through Strength manipulation, it also aims to stop opponents from challenging some of its weaker pirates while flooding the board with powerful card draw and recursion
Here's the slightly longer version: One of the two mechanics in the set is inspired
I think this mechanic captures all of that and ties it into the very UG themes of +1+1 counters and steadily growing board-states