Someone in the forums said that Chasm Skulker is one mana too heavy to be a really good card, and I agree. That one additional mana means one extra turn to take damage from your opponent. Even then, against casual decks in Just for Fun this deck is powerful and a lot of fun.
Here is a win with an unblockable Chasm Skulker.
Here is yet another win with the same setup as the previous game.
And if by turn three I am hitting for 5, I can cause a lot of damage early in the game. This deck, however, is very weak to removal.