Realm Cards are required to open a portal to a new realm in Nightingale. Not only do they allow you to choose which biome you'll wind up in, but they also give you some control over what you can expect when you get there. You'll have your own home realm to return to, so while much of your time might be spent realm-walking, you will have a relatively safe place to put your feet up if you need a break.
You need two cards to open a portal: the Biome card is self-explanatory and determines whether the resulting realm will be a forest, desert or swamp, while the Major card dictates which parameters it should abide by, including points of interest, NPCs and quests. You can also play another type of card by locating the Realmic Transmutor once you're inside the realm, but for the purposes of this guide, I'll concentrate on the Realm Cards required to open a portal.
