Tempered Steel is by far and away the best way to beat aggressive red decks which are one of your only tier one matchups that is not a good one pre board
If you can afford it, you should definitely include fetch lands to show off those awesome dual lands you have
Its design is inspired by bats and dragons, blending nocturnal mystery with mythical power
During your Main Phase: You can place 1 of your "Sanga of the Thunder", "Kazejin", or "Suijin" that is banished, or in your hand or Deck, face-up in your Spell & Trap Zone as a Continuous Spell, then, if you control a "Labyrinth Wall" card, you can destroy 1 monster your opponent controls
For me, the Ruby/Sapphire deck was filled with bangers mostly thanks to my Moana and DuckTales fandoms
On the other hand, it's not even been a week since The Glory of Team Rocket released, so this Japanese price is likely inflated