Excalibur is the second strongest weapon in Final Fantasy I Pixel Remaster. By acquiring this weapon, you will also earn the Sword of Myth trophy and achievement. To see how you can find this weapon, you can check out this tutorial at Seeking Tech.
1. If you haven’t done so already, you need to find the Adamantite. This item is located on the lower left room of the second floor in the Flying Fortress dungeon.
2. Once you have obtained Adamantite, go to Mount Duregar.
3. In this town, head to the top room and talk to the blacksmith.
4. The Adamantite should automatically be handed over to the blacksmith, which will then craft it to the Excalibur.
5. Once the weapon has been handed to you, the Sword of Myth trophy and achievement should pop up.