Extra Free Cast and cards under Jacob Hauken
My opponent had only activated Jacob Hauken 4 times before transforming it, and after doing so cast multiple free spells without other ways of doing so. They also cast cards they should not have been able to. My opponent's username was TheBooman.
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Kpsla#37203 commented
You have described the effect written on "Jacob Hauken, Inspector" and "Hauken's Insight." There is no bug.
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[Deleted User] commented
Did you even read the backside of Jacob Hauken?
"At the beginning of your upkeep, exile the top card of your library face down. You may look at that card for as long as it remains exiled." This explains how they got more than just those 4 cards.
"Once during each of your turns, you may play a land or cast a spell from among the cards exiled with this permanent without paying its mana cost." This explains how they could cast spells without the mana to do so.