I had said previously that rise of the underworld was absolutely a top notch expansion for brewers but I have to say that these card releases during this event might be just as good if not better
----lets run through a few of the standouts---
Champions:
Akshan is a very flexible card, he can be aggressive and combo oriented, he can be a card advantage tool for control decks, and he's just great landmark support.
Shadow dude is a bit meh by comparison, I like the idea of mind control being better implemented into the game (follower stealing) but I don't like that he's also a better Nasus at the same time. (A little too easy mode) but not op because of how slow he is.
---Removal----
We were just talking about how there's no good removal in shadow isles, and we just got two really strong pieces. It turns out spending 4 mana for slow speed champion removal is actually kiiiinda good, it also adds value to all your healing
Similarly 5 mana drain two from two units is kind of a high value static shock I love it.
---followers---
Shurima gets a 5 mana 5/5 finally and getting free treasures is pretty strong if you have the support to keep it alive
6 mana for a better cat submarine in Ionia is beyond strong. Because you can choose slow, fast, or burst you can actually reliably tutor out answers...like I dont know 4 mana champion removal.
I like Ibex a lot for more support pieces poor lulu needs some love.
Getting free attacks in noxious is pretty interesting, having a way to turbo level MF in a pirate aggro shell ads nuanced possibilities to a hunga bunga deck
Ice wolf mother is probably my low key favorite, even without running "a lot" of frostbite I found the wolf cub getting to like a 12/12 in Long games and it offers a finisher for frostbite decks that makes more sense thematically
Fury dude is the last one to mention, it's a little akward because if you get a really big Shivana you need to give her overwhelm to win, so that's absolver or sunlight blade, and I'm not an all in on one card kind of player.
Overall just a really solid event that pairs well with both the new champions/cards we got last go around plus the large number of balance changes.
I'm willing to admit that this outstanding work by Riot and honestly if they want to adopt the it ain't broke dont fix it mentality for the rest of the summer they've earned it honestly.