If you have Academy Manufactor on the field, then you also create a Treasure Token and a Food Token every time you investigate, leading to endless ETBs, endless LTBs, endless Clue, Treasure, and Food Tokens, infinite lifegain, infinite card draw, infinite draw triggers, and infinite mana
On your turn, spells with your hand with mana value X or less have Cascade, where X is the amount of life your opponents have lost
A great card can be worth a decent amount even if it's printed at common rarity, while a super rare one that nobody wants to play could be worth significantly less
This spell is even better in self-mill decks where you can treat your graveyard as a secondary library
Anguished Unmaking is another great one
I recommend checking it out here