If the game goes long then it's a good option, and it's something that you can potentially cast from hand which is huge against Grafdigger's Cage and Containment Priest. Hogaak makes for a decent inclusion but I don't think I would count on it as the only wincon.

It's real tough to deal with, and going up to 26 or so can keep you alive an extra turn or two, great against Burn and Goblins. I'm considering Hogaak but the only thing I could see removing is Creeping Chill, and that card is so amazing in the deck that I really hate to do it. I usually don't discard one first thing on game 2, I prefer to dredge defensively to protect against hate, particularly once they know your wincons.

Phantasmagorian makes for some good tricks because it's instant speed, you can ditch your whole hand on their end step for surprise Nether Shadow and Ichorid triggers. With the London mulligan you're only set back a little against most decks, you're probably dead to combo either way. Unless you have a Street Wraith for a redraw (and even then.) you absolutely have to mulligan a hand with no dredgers, the longer you go drawing from the deck instead of dredging, the more likely your opponents will wreck your day.

Blue manaless dredge