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Overall though, I feel your ways of generating tokens is very on theme, but not very sustainable

I dont see why I wouldnt add this one to any deck I build with clues, and even a bunch of non-clue artifact decks, because cost reduction is always good and never broken

Considering how tricky it is to find competitive budget decks for arena, especially ones that aren't mono-colored aggro decks, Rosie's Infinite Squrrel Combo seems like a great entry deck to the Historic format which plenty of upgrade potential

Additional Reading: First, I will introduce you to a neophyte's best friend: The Saturday School and Ask the Judge archives