Just know that its the kind of card that makes people rage-quit, especially if you double its attack trigger
[17] Originally, slot 7 would have a 87.5% chance of a common from the set and 12.5% chance of a List card (9.38% A common or uncommon reprint from The List, 1.56% A rare or mythic rare reprint from The List, and 1.56% A Special Guests card)
Early hosers were often negatively balanced, but more recent color hosers have often given buffs or cost reductions to your creatures if an opponent casts a spell of a certain color or has certain colors of permanents or type of basic lands
As you can see, this is drawing one card per creature spell cast, typically for free, although the Lifecrafter's Bestiary costs mana
It's so dependent on the Throne of Eldraine microcosm that it's kind of funny that it was as powerful as it was during that time
Prices are lower than winner/finalist variants but still higher than regular prints