The Binding Blade

For the weapon of the same name, see Sword of Seals

''After surviving many hardships, Roy finally set foot on Bern's soil. Guinvere guided Roy towards the Temple of seals, but in their path stood Bern's elite troops. The strongest army of the continent, led by Lord Murdock, the smartest and strongest general in Bern. Etruria and Bern, the two leading forces on the continent, out for all-out war. The longest and bloodiest yet to be seen by Elibe is about to begin...''

The Sword of Seals is the 21st chapter of the the eponymous game. At the end of the chapter, Roy receives the Sword of Seals, and he will be promoted to Master Lord, unless you access chapter 21x (at which point, Roy's promotion will occur after you complete chapter 21x). This chapter is notable for having Murdock and Galle, two of the three remaining Dragon Generals of Bern, as prominent enemies. In this chapter you basically face the standing army of Bern, so expect lots of reinforcements. To access the gaiden chapter, you must complete the chapter within 30 turns and have Miledy and Zeiss alive, which makes it even more difficult. You can tell when 30 turns are up when Pereth and his subordinates appear from the throne claiming to have gotten rid of Apocalypse. You also receive the bishop Yodel in this chapter, who comes with the Saint's Staff and either the Murgleis or the Maltet, depending on whether you went on the Ilian or Sacaen route (i.e. you receive the weapon that you did not already have). It is highly recommended to take dragon- and horse-slaying weaponry as there are lots of paladins and wyvern units, along with a couple manaketes. There is a secret shop in this chapter, so you have a chance to get a few rare items if needed.