When setting up the game(for 2 players, the reference cards tell me to generate 1 portal. I add it + a monster on it.
BUT, what about the monster surge? are they just telling me the number of monsters that will spawn later or if I HAVE to summon a monster with the corresponging portal symbol? (and maybe summon an other portal)
Keep in mind though, "Number of Players" refers to the number of CHARACTERS being played, not the actual number of players.
So, if 2 players are each playing 2 characters, you would set up the game as if there were 4 players.