Thematically its grand, and since its each opponent, the total life loss piles up
In the ideal state, Tetsuo, Imperial Champions trigger would either be able to deal seven or more damage, or cast an instant or sorcery such as Heros Downfall or Searing Flesh
When anything could happen, how could an opponent prepare for it
At the very least get that first quote then post your collection on Facebook Marketplace ( or whatever local platform ) with good pictures and see what interest you have and if theyll pay more then the store
Alongside the regular suite of Instants and Sorceries, Equipment with removal effects attached works particularly well as Arna can get repeated use out of them
You might even get more than four mana, which is kinda nuts so early in the game