When you finish the quest, return to the Stable Boy. Your Horse Riding skill will be level 1. After that Stable Boy will give you a license, the Horse Sword . It will take some time (12-24 hours). You can now go to the Stable Boy again. He will tell you that you can buy Horse Sword for 100.000 Gold , and tell you that you can use it to summon horse.
• You have 10% chance to successfully call your horse, so be patient. If you want increase your chances, you can read Horse Taming Manual
You can complete 9 quests to improve your Horse Riding level. Quests are simple. Only what you have to do is deliver Horse Medal to Stable Boy and ride to indicated points in the Mini Map.
• Level 2-6 - Map 1 in your kingdom
• Level 7-10 - neutral Map, you will be teleported into area after open mission scroll.
• You can take next mission 18-30 hours after you finish previous (it doesn't matter if successfully or no).
• If you dismount horse or fall when you are doing mission, mission will be failed.
• You will loose your Horse Medal only when you complete mission successfully.
2. Armed Horse
To complete Armed Horse quest you have to be at level 35 at least and have Horse Riding skill at 10 level.
To complete Armed Horse quest, you need to kill 50 Scorpion Archers or Snake Archers in 30 minutes. You don't have to do it alone. You can invite other players to your group (you need to be the group leader) and all killed archers by all players in group will be count.
After you finish mission, go to the Stable Boy. He will tell you he need some time (12-24 hours) to prepare Armed Horse Book . When you go back to the Stable Boy he will give you the Armed Horse Book for 500.000 Gold . Now you can use this book to summon your Armed Horse.