Hearthpwn

Auto-include in Questline because it's a 1-Cost spell that always gives you a different 1-Cost spell.

It's 1 mana and works with the quest, so it might see play based on that. 

One of those tri-discover cards that they've already made for other classes that NO ONE RUNS

This one might see play tho. It can always serve as 2 steps towards the quest. It's a holy spell. And it can be discounted to 0 with cariel.

The thing that makes me think it might not see play is actually the tri-discover part. You could be offered 3 shitty discovers of each type. Being offered 3 of a certain type is a lot more flexible

That's true.  You could guarantee it as two 1-cost cards by always picking the secret.  Divine Shield cards might be better on average than "a pirate."

For if you really want a chance at another bolvar or shield of wrynn. Otherwise the 1 mana tax is very sad.

I am not sure I would ever want to include it in any Paladin deck, ever.