A mastodon must be trained before it can bear a rider in combat. To be trained, a mastodon must have a friendly attitude toward the trainer. (This can be achieved through a successful Animal Handling check.) Training a friendly mastodon requires six weeks of work and another successful Animal Handling check (DC 20). Failure means that the beast is not fully trained and another 2 weeks of effort will be required to try the check again. Riding a mastodon requires an exotic saddle. A mastodon can fight while carrying a rider, but the rider cannot also attack unless he or she makes a successful Strength (Athletics) check. Mastodon young are worth 16,000 gp each on the open market. Professional trainers charge up to 2,500 gp to rear or train a mastodon.