Since your deck is heavily combat-focused, flying is a great way to get in for damage, especially if your opponents don't have ways to block flyers
This illustration doesn't depict a scene straight from the game itself, but rather, brings to life a situation that was occurring parallel to the main character's journeyakin to a cinematic shot of a different side of the same story
That up-front Adventure is just a bonus -- the real reward is outlasting the opponent with reanimation that draws from either graveyard, which is even better in "aristocrats" builds.
Mass Hysteria has many more replacements in red, but Crossroads is pretty unique for green, and therefore the decks that need this effect really want this card specifically
Whenever Gollum, Scheming Guide attacks, look at the top two cards of your library, put them back in any order, then choose land or nonland