Simplify the following text for a Grade 4 native English-speaking person.
Original: Then the Varden and their leader ( named Ajihad ) find out Galbatorix is attacking them with Urgals .
Simplified: When they reach the Varden , Urgals come out of nowhere and attack them . When they arrive in Farthen DÃ '' r , Eragon is led to the leader of the Varden , Ajihad .