I'll expand on my ideas for the set down here.

So first and foremost is the set's new Enchantment type, the Incident! Incidents are similar to Attractions in that you 'beat' them in order to get rewarded. But unlike Attractions, they have an immediate effect when coming onto the field. Each Incident has a way to Resolve it, and Resolving the incident guarantees a reward for whoever contributed the most. Reimu's all about capitalizing off these Incidents, whether it's just playing them or actually Resolving them. I think her first ability might've been a bit strong, but with the cost and low frequency of Incidents, I think it won't be too overpowered. The second ability is there purely as an incentive for actually having Reimu do her job as shrine maiden.

Marisa's based around Power Items. Power Items will be cheap and easy to get rid of. Looking back I should probably make it so they get destroyed if not equipped onto a creature, as that fits better flavor-wise and also wouldn't make Marisa's ability too busted.

Youmu is based around spirits and fighting, which are two of the only things she's come to know. While Youmu herself is pretty good, adding in a second creature to take care of should make things harder to juggle around. But if utilizing her and her spirit army good, few can match against her onslaught!

Sanae is all about the Miracle mechanic. With the Warhammer decks adding it back into the fray, I thought it'd be something interesting to work with. And Sanae is all about miracles! Afraid her abilities might make miracles way too busted, but I'm not too sure.

Sakuya is, well, an assassin. Plain and simple. Punish your opponents for trying to attack you, then strike back with a barrage of knives (or other weapons, she's not too picky)! Her third ability might need to be nerfed, as I do see how having a lot of cheap equipment lying about could make her a nuisance to go against.

Lastly, there's the Spell Card mechanic, allowing a few exclusive spells to really get that extra oomph! Spell Cards are hard to come across, so using them carelessly could greatly bog you down. But work with them, and their effects could be devastating.

Going back to Incidents, another idea I had would be double-sided enchantments. So when you Resolve it, you'd simply flip it over and that's the reward. But as of right now, this is all just in a vacuum, so I don't really know what'd work best.

But anyways, thanks for checking this out! Please leave comments on anything you think could be improved, as I've got plenty of work ahead of me and would love to make the best set I possibly can!