It's <p>The quest you're referring to is called the Machinery of War Quest. It's listed under Tibia Tales, Tales in your quest log and you can also see your rank by seeing going to Orc War Rank once the quest is accepted. You <strong>You need to be at least level 50 to do this quest and premium isn't required. required.</strong> Baxter, who is the NPC for this quest will tell you "I have no use for recruits who die in the first skirmish! Come back when you are better trained!" if your you're below level 50!
Sources:
https://www.tibiaroyal.com/en/guide/quest/223/machinery-of-war-quest/spoiler
https://tibia.fandom.com/wiki/Baxter/Transcripts50!</p><p>For this quest you need (each time you do the tasks)-</p><ul><li>Up to 44 <a rel="nofollow" href="https://tibia.fandom.com/wiki/Bricklayers%27_Kits">Bricklayers' Kits</a></li><li>1 <a rel="nofollow" href="https://tibia.fandom.com/wiki/Fire_Bug">Fire Bug</a> (but it is advisable to carry more than one since it can explode in your hands)</li></ul><p>Sources:</p><p>https://tibia.fandom.com/wiki/Machinery_of_War_Quest<br>https://tibia.fandom.com/wiki/Baxter/Transcripts</p>