While it's true that Descendents' Path is probably too slow, just in terms of basic probability it makes you no less likely to draw enchantments or sorceries than not playing it. If all the card did was take the top card of your deck and put it on the bottom, without revealing it or allowing you to play it, you wouldn't think that it was depriving you of lands or whatever; it would just be a reordering of your deck, and if your deck is properly shuffled it wouldn't matter. It wouldn't increase or decrease your odds of drawing anything. The fact that it reveals the card and can play creatures for free doesn't change your odds either.
That being said, your odds of drawing a creature in a typical deck would be a little under 1 in 3. If you play Descendents' Path on turn 3, you're probably only going to get a creature every 3 turns, so maybe one on turn 5, one on turn 9, one on turn 10... Potentially powerful in longer games, but also pretty unreliable. I was thinking the other day of a hypothetical deck with massive land ramp followed by 4 Descendants' Paths. It was an entertaining idea, and could theoretically be extremely powerful, but it might also probably be too slow or improbable at getting started in the first place. Draining your deck of lands would increase your odds of drawing creatures and more Paths though. I'd be interested in doing the math on that deck... later.
But yeah, sorry I got sidetracked. No, in general throwing in a Descendants' Path is not going to automatically make your deck an unstoppable monster generator. Primal Surge could though. But as far as this deck is concerned, it's already way too slow, so that wouldn't help you at all with its high cost - you'll already have lost by then. Maybe add some cheaper cards that help you draw more land or extra cards, and some removal so you can hope to make it to later in the game.
Last edited by xlebec (2013-02-20 23:37:55)