Excalibur

Source: npc/quests/Lvl4_weapon_quest.txt

1. Complete the level-4 weapon line with smith Hein.
2. Gather and submit the required materials (final result is rolled from that branch pool).
3. At state branch lv4_weapon == 47 (alt result branch), reward can be Excalibur.
4. Script line: getitem 1137,1.
5. If you roll another weapon, repeat the process.