In the world of cultivators, when crafting a lifebound treasure, the first choice is often a sword, the second a cauldron, the third armor, and the fourth and fifth choices are other items.
The first magical treasure a cultivator uses is often a sword;
The first divine technique a cultivator learns is often swordsmanship.
Firstly, cultivators using swords do so with elegance and extraordinary demeanor; the world has sword flight, but no cauldron flight, knife flight, or tower flight;
Secondly, swords have low material requirements; the lower limit for sword-type magical treasures is low, but the upper limit is high. With minimal materials, one can craft an ordinary magical treasure; with substantial materials, one can craft a top-tier treasure.
As for cauldrons, towers, palaces, and armor, the same grade consumes a lot of materials.
Only wealthy families can afford to craft such heavy armaments.