The giant, town-destroying Squirrels
As for trading, the new feature was detailed last week, with a short paragraph dedicated to it in Thursdays news release: Players will need to use two new items, trade hourglasses and trade tokens, in order to trade cards with a rarity of 1-4 and 1 with cards of the same rarity
If you play this as a slow threat in decks with a lot of high mana spells, it's not the worst option as it's both a beater and a kill spell
Growth Spiral Magmaquake Nightpack Ambusher Mono-Green Planeswalkers (2 players) : A large number of ramp spells allow Karn, the Great Creator, Nissa, Who Shakes the World, or Vivien, Arkbow Ranger to wreak havoc on the battlefield as early as turn three
Dual-set release keeps sealed prices competitive