Master Auron:
Good, so you have found the sword of trial. Here's what you must do now ... If you go out to the wilderness, you will find poison spiders -- their bodies are bigger than wagons, and they're violent and dangerous to deal with. Use only the rusty bronze sword to hunt the poison spiders. You may not use any other weapons.
When you kill a poison spider, cut off its legs and keep them. Ah yes, and you may also bring the legs of the trimden, a spider which is a little more ferocious even than the poison spider. Collect twenty spider legs and bring them here. That is the test to become a Warrior. If you pass this test, I will give you the medallion of the Warrior.
Say it's impossible with a rusty sword
Say you understand