Im playing one-mana removal because one-mana plays are extremely important, but Im also playing some two-mana removal to increase the power of Niv-Mizzet Reborn by giving it more hits, especially cheap hits
The card, if it resolves, provides you with a clean 3 for 1 which is a nightmare for many decks to deal with
Since whenever this creature deals combat damage to a player is often used as a balancing mechanism, Jin Sakai often unlocks the true potential of new cards
Not only that, but the Creature gains Indestructible until end of turn whenever you cast a spell, making combat a nightmare for your opponent if you have open mana
In a deck that wants to play things from exile - of which there are many - these are just upgraded clue tokens, because they not only cost no mana, but also have so many synergies in Commander with cards like Laelia, the Blade Reforged, who gets stronger whenever you put cards into exile