While Into the Flood Maw is flashy, Unsummon is surgical
The decks also helped the set feel like more of a return by bringing back an element players wanted which couldnt fit in the main set proper, much like the precons for Lost Caverns of Ixalan
The lifecost is interesting, since black has historically been better at card draw than green, but this seems to argue in a different direction, although green has always been good at drawing through creatures, specifically
Even so, it's a significant step up, and I'm looking forward to seeing how it plays
If either player does not have a Basic Pokmon, they reveal their hand to the opponent, shuffle their hand, and redraw another seven cards