Alright, cards are officially reveal which makes them a lot easier to talk about. I'm not entirely sure what I'm personally interested in yet, but I do think there are some generally interesting cards.
Not sure what's with all the 3-drops in the set.
Vesuvan Drifter is a pretty aggressively statted wind drake that is probably one of the better "topdeck matters" inclusions, and the trigger is pretty solid at baiting removal spells if you could threaten something like a
Colossal Skyturtle. Probably requires a relatively niche environment though.
Urborg Scavengers is a 3/3 for 3 that grows each time it attacks, and can easily nab a lot of handy keywords. Can be both a fun little build-around and offer some graveyard hate if you don't want to play with the overly complicated
Graveyard Trespasser.
Nissa drawing you an Elf or Elemental every time you crack a fetchland is potentially very powerful, especially with MH2 incarnations. She's otherwise a 3/3 lotus cobra for 3, the card draw isn't a replacement.
Tranquil Frillback is a handy toolbox, a bit boring for my taste, but seems quite solid. Decent blink target. Also the third 3/3 for three, for those counting.
Samut is just an aggressively statted creature. Vigilance and first strike makes her a pain in combat, and it's pretty easy to envision her being a two-for-one. Whether she can draw any more cards will be highly cube-dependant, but she works well with rabblemasters, dash, unearth, and obviously creatures with haste.
This feels like the Boros
Thousand-Year Storm in that it can lead to some nutty games, will often be useless, and is a sick design. I'd consider it if your cube design leans more towards chasing those highs instead of more play-skill perfection.