These were originally awarded to the best players of a Yu-Gi-Oh tournament held in 2018 by Konami, and although a few people managed to snag one, there was no definitive number by Konami
Yugioh had a moment like that too with Master Rule 4 back in 2017, which killed 11/12 of my decks in viability immediately and made me drop the game after almost 15 years of playing mostly non-stop (locally anyway)
Its a simple effect, but one that could make the difference between claiming victory or not
as they are not placed in the Spell/Trap Zone and are instead played within the Field Spell Zone to the left of the playing board
Over the years, I progressed to running Aurelia as a full equipment strategy, and to running other Commanders like Akiri, LineSlinger & Bruse Tarl, or Syr Gwyn, Hero of Ashvale
The worst-case scenario for Tithe is 1 mana + one land