Maybe it can cost 5 but imo playing this on a curve when you have a relatively big board would be really strong since if you high roll more than one big target, your opponent literally had no way to deal with it and it is on turn 5. Most board clear cards are high cost so just making it 5 Mana could cause some meta breaking shaman decks. However I’m not saying it can’t be changed to 5 cost. Not every game you will have the chance to play a spell like this on curve.

They can’t make this spell 6 cost or it will be just too good in even shaman since they get out lots of tokens easily and quickly. They can’t reduce it to 5 cost or else that would be a huge turn 5 power play. I think this card is super akward since they can’t change the cost of it and it’s effect can be strong but only if you high roll.

If you draw any combo cards your pretty much fucked.

Thanks!
Replacement for Zola is kinda tough to do because it is one of the combo pieces you need to do the OTK. However you can still pull the combo off, it will just be more tedious. It might take you an extra turn to get all 4 horsemen. There are no replacements that do the same thing as Zola for Paladin but you can always add another Pixie to get more horsemen out. The more horsemen you have out it will also be likely that some of them are duplicates. If you opponent isn’t paying attention they might kill the wrong ones. I haven’t tried the deck with 2 Pixie’s yet but it probably gives you the best chance of winning without Zola. Another card you can replace Zola with is Redemption and Desperate Stand. You want to make sure that the opponent does not have enough resources to kill your horsemen twice so it is probably best to use these cards with Rebuke.
However, I recommend you craft Zola if you can. Zola has seen some play in decks like Quest Priest (Which may be getting stronger because of the legendary spell) . However if you are unsure, you can wait til the expansion comes out and then craft the card if you see Zola in any of the decks you want to play.

Sorry for the bad formatting. First time making a deck guide .-.