The unofficial but widely respected database Scryfall, which meticulously catalogs every version of every card, lists over 60,000 distinct printings for English-language cards, encompassing all unique artwork and expansion symbol variations
Kristen breaks down ten great variations on Counterspell that you should be trying out in Commander
TPCi would have needed to pretend it's 1999 to localize the card today, although they already practiced that for cards like Greninja LV.X in Celebrations
In many cases, yes it can
From there, if you're not comfortable playing a deck with so few traditional offensive options, you can opt to take copies of a disruptive low-cost creature like Deep-Cavern Bat or something with surveil and card draw potential, such as Faerie Dreamthief.