A Siege Bomb is a powerful item that can be used to do enormous damage to the Guild War Gate.
NPCs: Old Quarrier (Ape City 568,527), Norbert (Maple Forest 810,458)
Level Requirements: As long as you are able to kill the Bandit.
Required items: 5 pieces of Saltpeter, a piece of Sulphur and 30,000 silver.
1. Find Norbert in the forest village to know the whole story, the reason he invents the Bomb, the materials needed to make the Bomb, etc.
2. Get five pieces of Saltpeter from Old Quarrier. You should give him 10 Euxenite Ores in exchange for a piece of Saltpeter.
3. Kill the Bandit to get a Sulphur.
4. Give (five pieces of Saltpeter)+(a piece of Sulphur)+(30,000 silvers) to Norbert, and he will make a Bomb for you.
How to Use the Bomb:
Put it in your inventory and then click on the Guild Gate. If the Gate is closed and it is Guild War time, you will be asked to confirm whether to use it.
The Bomb exerts enormous damage to the Gate. Using 4 Bombs in maximum can open the Gate. By the way, you will definitely die if you use it.