Hearthpwn

How easy would it be to discount it? 

Maybe not as easily as odd paladin but, thinking about it, nowadays zoolock can put out more minions and faster than any previous iteration of the deck: Saronite Chain Gang, Doubling Imp, free Happy Ghouls... Against other aggro decks it should be easy to discount, and against control their Giggling Inventors would help as well.

How good would it be?

Well, discounted Happy Ghoul is a big part of why the heal package is run in zoo, so I guess yet another 0 cost, decently sized minion, would be good as well.

I'd like to hear your opinions on the topic!

Note: If I were to include Corridor Creeper in the deck, I would do it like this I think. Maybe add Giggling Inventor somehow for easier discounts?

to be perfectly honest the deck really doesn't need corridor creeper, but back when corridor creeper was a 5/5 it would have been an auto-include, same for every other deck hense why it got nerfed, now there are just far better options, but if you wanna still use it go ahead.

Yeah I agree that the deck doesn't need it, but maybe as a 30th card (and 29th I guess) instead of Lifedrinker (which is often cut to make room for tech cards).

Guess I'll have to see for myself if it's impactful enough