How did you manage to do this?
actually, I just enchanted diamond swords with sharpness 1 and put those togethermaking a sharp 3 sword on lucky would've been at least
1+1= 2 this would be a level 2
Then you repeat
1+1= 2 this would be a level 2
Then you combine those two
2+2= 3
Conclusion: kill 4 people with level 1 sharpness
hope you understood