This one-mana artifact appears in over 90% of decks across all power levels, providing immediate mana acceleration that can determine entire games from turn one
Dragons of Tarkir gave us five newcomers (Dragonlord Silumgar, Dragonlord Atarka, etc.), Core Set 2019 gave us retrains of the originals (Arcades, the Strategist, Nicol Bolas, the Ravager), Strixhaven added five more as the namesakes of the different schools (Tanazir Quandrix, Beledros Witherbloom, etc.), and the five metal dragons from Baldur's Gate were also given the double creature type (Ancient Bronze Dragon, Ancient Copper Dragon, etc.)
The reason you've probably never heard of this one is that it requires ante, which most people simply never play with
This is dangerously good, better than Young Pyromancer good, when you have silly mana production courtesy of Cradle or Crytolith Rites etc but it is much more on the fair to unimpressive side without
Remember how I said that there are few-to-no completely bulk mythic rares these days