I agree this card is a midrange/late game effect, but its not really that different from the role that Devout Witness used to play for control decks (prior to Revoker/Trike(now ballista) becoming a 4-of in every list). Shops still put up a ton of results during that time because you still need to beat Shops in the early game for mid/late game to even matter.
This being a sorcery is a huge point against it in Xeroxy decks. Still a good card, but I think Grudge is likely better.
I honestly didn't see it was a sorcery. I don't think it's a huge issue against it, but being a sorcery means it's probably not maindeckable.
@thecravenone Shenanigans can be cast twice (or more) in one turn, too. Dredge can replace a card drawn for any reason.
As soon as I submitted, I realize I should've clarified: Ancient Grudge can be cast twice in one turn without further enabling while Shenanigans can't.
@evouga if this was an instant, I could see me playing 1-of maindeck so it could be relevant even against PO or whatever. Being a sorcery I guess this is just a Shops-hate card.
BUT: there's an interesting interaction with it against decks that are not heavy on artifacts. You can discard it to JVP, Dack, whatever, and "draw" it whenever you actually need it. That way you can interact with stuff like half Vault/Key or whatever else they play. The option is pretty neat. My point being that in a JVP/Dack heavy deck, this can see MD play.
This card will be a tremendous boon for dredge, especially as blue decks have to gravitate away from Priest due to its lack of synergy with Narset. This card is more vulnerable to tormods crypt, but good dredge players can usually play around crypt effectively in either games 2 or 3. The dredge player being able to dredge their deck without having to worry about milling through answers makes the deck auto pilot far more effectively post board. Sorcery speed basically does not matter for the dredge player.
I've recently started testing this card in the sideboard of Oath. It seems very strong. It single handedly won a game against aggro shops. Matt Murray also told me about this card being the cage breaker. Recasting this turn after turn to destroy Grafdigger's cage fills a much needed niche against RUG Xerox.