Shadowverse

I still don't have any of the scenarios. But they're cool. At the very least, the Skellige and Nilfgaardian ones are great maps right now; if you want to play those classes, they're a must-have. The Elven and Monster ones are good maps, but not essential; you can play without them. The Northern one is only good for fun decks based on machines. I haven't seen the Syndicate one in the game at all, but the Syndicate isn't very good overall right now.

I don't have any yet either, but I've seen some in action, and they looked impressive, especially the Skellige one, which seemed particularly interesting. I'd like to play all the classes, but it's difficult at the moment. I do have decks (except for the Syndicate, which I decided to save for later), but they don't really match the meta. They work well in the lower ranks, but it gets harder after that. But yes, in the holiday event, I chose the Skellige, Nilfgaard, and Northern factions; I'll focus on them.

As for the stratagems, I'll probably craft the Lamp; it's neutral and will be useful for different classes. I won't craft the others yet; I don't have enough resources, and I still want to craft a lot of other things...

The expansion was really sudden; I didn't save up for it at all.

It's surprising that it wasn't announced in advance; I didn't expect it at all, and I wasn't saving up for it; on the contrary, I was spending because I needed cards. And then, bam, 70 new cards that I know nothing about, and the Mahakam season hadn't even finished yet...