While we're playing Tergrid because the front side is so powerful in our deck, Tergrid's Lantern sometimes is an even better finisher, and having both Tergrid and its Lantern on the battlefield at once puts our opponent in a really difficult position where, if they discard cards to avoid taking damage to Tergrid's Lantern, we can steal them with Tergrid proper, but if they take the damage, we can quickly burn them out of the game
The set is focusing on the original Avatar: The Last Airbender animated series and won't be touching anything from The Legend of Korra, though that's not to say something could release in the form of a Secret Lair or two
None of the other blitz cards allow you to continue blitzing out of the graveyard, though, which makes Sabin, Master MonkSabin, Master Monk both unique and very powerful
If youre looking to expand your collection, you should definitely get one of them