Rogue One-Shot Technique (Patreon)

Recently there was a post on the official bug report forum from a player who claimed to have been hit for 300K-800K* damage by a rogue using the caustic spatter, talent in Orgrimmar.

https://us.forums.blizzard.com/en/wow/t/exploit-making-caustic-spatter-deliver-attacks-damage-in-a-range-of-300-000-to-800-000-nature-dmg/1743903

The post does not explain the exploit. However, I was able to reverse-engineer it.

It works like this:

1. Choose the caustic spatter talent from the assassination rogue tree.

2. Apply deadly poison to your weapon.

3. Find an npc that cannot die but is low-level.

4. Apply rupture.

5. Use mutilate

6. Watch everything around you die.

The difficult part is finding a npc that cannot die at low-level.  Since the bug report post states the player was in Orgrimmar the npc that was used is very likely this one:

https://www.wowhead.com/npc=169166/provisioner-jinhake

This npc was featured in a similar death knight exploit Rextroy posted some months back. https://youtu.be/HC2wiCrxPtY?t=382

Rextroy's initial exploit was fixed but the same npc can be used with any ability that does secondary damage based on initial damage without modifiers, as with caustic spatter.

*Note that caustic spatter actually ticks for 10 seconds for this amount so no player will be able to survive a full application even if they survive the initial tick(s).