The Bug

Smite 5 can insta-kill an undead with 20 HP. If there's a non-undead mob with less 'an 16 HP beside, then we can insta-kill the both by just sweeping to the undead with Netherite Sword enchanted Smite 5 & Sweeping Edge 3.

How to Produce

1. Obtain a Netherite Sword with Smite 5 + Sweeping 3
2. Kill a Pig first, you have to kill twice
3. Summon a Husk and a Pig nearby, kill the Husk with sweeping attack

(✘) Both are insta-dead.