Panharmonicon doubles enter-the-battlefield triggers, which is extremely powerful in decks built around ETB creatures and artifacts. In Modern, it encourages slower, value-centric builds that try to capitalise on multiple triggers from cards like Mulldrifter or Solemn Simulacrum. The format's speed means it is more of a pet card than a tier-one staple, but it has a devoted brewing community. Its splashy ceiling and synergy with new ETB pieces keep it a persistent option for creative Modern players.