At this time, if you keep attacking the person with an open board, it will end up being exploited by Y'shtola or Cloud equipped with lifelink gear (Yuffie, who has weak defenses, will be taken out instantly, and the remaining players with low life will be defeated in succession)
Then you can remove six counters from your stuff to cast this from your graveyard, so built in recursion is amazing and really dials it up massively
That explains the demand for this card, and it's also likely to be in fairly limited supply, given that it was only printed in the Warhammer Commander decks, which always get snapped up swiftly when a new batch is released
The raw power of generating so much advantage for so little cost quickly resulted in Ancestral Recall getting restricted
They often include mechanics that would be impractical in regular Magic, such as summoning random creatures from your deck, creating new cards, or permanently altering others
Its not only super powerful if you choose someone who is also playing Magic at the time (you get access to their cards!), but its also very funny to just randomly add a player to your game