Unexpected Windfall is an okay card to play in treasure decks, or as a way to discard and draw, but nothing more
Be aggressive with an army of creature tokens with the help of the squad mechanic, which lets you create extra token copies of creatures
You'll want a number of cards to manipulate the top card of your library in some way, like Sensei's Divining Top or Scroll Rack, so you can have some measure of control over what card will appear on the top of your deck
Green-white in WAR has a similar issue as it did in Guilds of Ravnica: its an A+B archetype, requiring two distinct components in order to function and falling far behind when disrupted
You can check out Scryfall.com for more info on them, as Gatherer is missing any promo card, so art from promos is, sadly, lacking
The basic land types are Plains, Island, Swamp, Mountain, and Forest