The problem I see here is that none - or maybe few - of these want to really be in a deck together
At four mana, he can sit at the top of your mana curve, and if you manage to drop a haste enabler such as Goblin Warchief, you can start doubling your goblins straight away (which then also have haste to attack the turn they enter)
There's a lot of ways you can make this work for you, as sacrificing something like a Shambling Ghast can actually two-for-one off a single card
Which ones do you run elsewhere
4 Pete - Games Referee 195/204, Steel Pete - Games Referee isn't a card that's going to win a game on its own, but it could certainly stand in the way of losing
As a two-ink cost card, Morph, Space Goo, is an incredibly cheap way of getting some nasty cards onto the table very quickly - thereby putting your opponent on the back foot very early on