The rest is practice, experience, experimentation, and learning from defeat
Basically, you sacrifice the artifact, activate your merfolk commander to play it from your graveyard, trigger Mirran Spy to untap your commander, then rinse and repeat as many times as cards you have left in your deck
Conclusion After checking the Lorcana Rarity Guide you will be able to easily find and understand all the Lorcana card game rarities in no-time
C Common Psychic Omnibuster X WIND Level 7 [ PsychicSynchroEffect ] ATK 2500 DEF 2000 1 Tuner + 1+ non-Tuner Psychic monsters Each time your opponent activates a card or effect on the field (except during the Damage Step): You can pay 2000 LP and declare 1 card type (Monster, Spell, or Trap) (but you can only declare each card type once per turn to activate this effect of "Psychic Omnibuster")
It's a key piece for certain hatebear strategies on the Reserved List
[390] [391] The suit is believed to have been settled