Deck Idea

The new Paladin Questline, Rise to the Occasion, will be a great way to abuse the abundance of strong, 1-Cost cards in Hearthstone. For example, Crystology and First Day of School each can complete one phase of the Questline on their own! In fact, because there are so many strong, 1-Cost cards in Hearthstone, a highlander version of the Questline appears to be advantageous for two reasons:

(1) we will be able to abuse overpowered highlander cards (e.g. Zephrys, Reno, and Alexstrasza), and

(2) we will have the benefit of never creating conflict with the Questline requirement of playing "different 1-Cost cards."

Because this list is a highlander list, I included a ton of card draw options since we can only have 1 copy of our best cards (e.g. First Day of School, Crystology, etc.). Additionally, the 4-mana slot is pretty empty in terms of strong cards to run, so I included Kazakus as he has proven to be a very strong card. Finally, to make the list have some extra staying power, Lothraxion is included to make our final hero power summon two 3/3's with Divine Shield.

Substitutions

This list doesn't look to abuse the upgraded hero power, but that is certainly a route one could take a list with this Questline. Playing Odd Paladin without the deck restriction and Baku might be the optimal way to play the Questline. Personally, I think the upgrade provided by Lightborn Cariel will be more than enough to overwhelm the opponent on its own.

Some of the 1-drops in the list are not necessarily the strongest 1-drops; however, we don't have unlimited options due to the highlander constraint. As such, cards like Jar Dealer, Dire Mole, and Glow-Tron are likely the first to be replaced once we get all of the card reveals and see how difficult it really is to complete the Questline. It may turn out to be fairly easy to complete the Questline, in which case the list might take an aggro route with cards like Leper Gnome and Blazing Battlemage (both of which are strong cards to begin with). 

Alexstrasza, Lothraxion, and Kazakus might be overkill in the amount of value provided, so they might need to be replaced for more consistent 1-drops or hero power synergies. For example, Sky Gen'ral Kragg might be better to use in this list than Kazakus due to his reactivity to the board.

Note: This list was reviewed on 7/28/2021, so it is lacking any playtesting. After seeing all the cards from United in Stormwind, the only addition from the set that might be worth considering is Lady Prestor. If Lady Prestor proves to be a powerhouse swing card, then she likely will synergize well in a deck full of 1-cost cards since we plan to use our hero power as our win condition; however, if we are looking to swing the game with a bunch of understatted RNG dragons, it might be better to include Prince Liam instead since he won't destroy Zephrys or Reno. If you have any suggestions, let me know in the comments!