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Mana from Automated Artificer's ability can be spent to activate any ability, including those activated from off the battlefield, such as ninjutsu or channel abilities

Both fall into very niche decks with reasonable sideboard answers and not necessarily all the tools to work outside of Vintage

And its ability to go back to library when it dies or is exiled means you can easily sacrifice it to Korvold attacking, draw it and do it all over again

As long as you draw a Pikachu ex card in the first or second turn, you can reliably deal 90 damage in a turn with Pikachu ex's Circle Circuit attack without relying on coin flips or Supporter cards