Time X is a keyword that represents the urgency of the heroes' quest. When a card with the Time X keyword is revealed, the players put X resource tokens on that card. These tokens are called "time counters." At the end of each refresh phase, remove 1 time counter from each card with the Time X keyword, if able. When the last time counter is removed, there will be a triggered effect that resolves on that card. Some encounter cards will also remove time counters, making it more difficult for the players to predict when they will run out of time.
When an encounter card with the surge keyword is revealed during the staging step of the quest phase or in setup, reveal 1 additional card from the encounter deck. Resolve the surge keyword immediately after resolving any when revealed effects on the card.
The Searches X keyword represents the heroes search for the Orc captain, Mugash. When a location with the Searches X keyword leaves play, the player (or players) identified by that location reveals the top X cards of his out-of-play deck. Players who reveal cards this way add each revealed enemy to the staging area, choose 1 player card to take into their hand, and discard the rest.
When setting up To Catch an Orc, each player is instructed to set the top 20 cards of his deck aside, out of play. Those 20 cards become that player's out-of-play deck.
There are 4 enemy cards in The Voice of Isengard that have player card backs: 1 copy of Mugash and 3 copies of Mugash's Guard. These are encounter cards, not player cards, and cannot be included in any player's deck. The reason Mugash and his guard have player card backs is because they are meant to be shuffled into the players' out-of-play decks when setting up To Catch an Orc.
To play normal mode, just follow the setup instructions on the quest card.
When you play normal mode (or easy mode of course) and if you're new to the game, you can also play the "Basic Game" defined in the core set rules:
Newer players or players who want a more basic experience can play and enjoy the game by not dealing shadow cards during the combat phase. This eliminates an element of surprise that could make the game too challenging for a beginner. Once players are comfortable with this experience, they can then add the shadow effects to make combat less predictable and more exciting.