Seriously, try it out and you wont be disappointed
You can proliferate an absolutely absurd number of times every turn by playing this card alongside Tekuthal, Inquiry Dominus (a card which was sadly ineligible for this list, as it only doubles proliferate effects on other cards and doesnt actually proliferate itself)
When you hear that someone owns four copies of Fable of the Mirror-Breaker ($20/card), you might be nonplussed
Even the fantasy of the game cant excuse it
The answer was there was none
Its name is functionally impossible to pronounce, it has no casting cost, when its played (by discarding it), it fetches a book from your deck, and it has an ability that sacrifices food to force creatures to hurt themselves