Refinement allows you to thin your hand (and by extension, your deck), all while drawing more cards to help you find the pieces you need to execute your decks winning strategy
If the equipped monster destroys an opponent's monster by battle : Y ou can add to your hand 1 "Skelebones" monster from your Deck to your hand
Youre a value hunter who wants better odds of finding underpriced gems (without promising miracles)
This card, a fringe tech in Standard which no one runs because no one is afraid of Chien-Pao ex anymore, is very dangerous in Expanded because of how many cards it shuts down
Cards like Lightning Greaves are more crucial than ever here, and you may want to invest in cheap counter placement effects, like TMNTs Mutagen tokens, to shore up Pir against board wipes
I just wish I knew how the stats really worked