In wild Shudderwock can be 3 of the 4 gods at once!
Is that good? Most likely not, but it's awesome.
On a more serious note, the card could be crazy good, but you need to build your deck around him.
That make him hard to judge.
Liam is such an odd card. His stats are good at least, but I have hard time coming up with a deck for him.
It would have to be a slower deck, since the effect take a while before it becomes useful, but it also play a lot of 1 mana cards for some reasons.
Then there is also call to arm, which probably means that you aren't playing too many 1 mana minions unless they are crazy good.
So maybe you play him in a control or midrange deck with secrets as well as the new 4 drop?
That's the best I've got.
Imagine after all this discussion that Prince Liam and Yubberzock are fake x_D
I don't mind talking about fan created cards, so it doesn't really matter to me.