Its interesting for a few reasons: you typically build your own deck based around some strategy, and so you need to think about the probabilities of drawing certain cards in a game (there are also cards that exist purely to manipulate the probability of drawing a certain card)
On its own, a 1/1 that deals 1 when it enters the battlefield doesn't seem that powerful, but when combined with Witch's Oven, it could be looped every turn
It's an ubiquitous win condition, that requires lots of green ramp (or green-mana hungry tutor effects) to put into play
Both gain life, so can run them together normally or in life gain decks too
Since theyre not part of a set, they were never standard legal but could be used in Commander decks
If you missed the first 3 parts, you can find them here