I tried to recreate the cataclysm's sudden death, blood surge and sword and board proc. I've used the textures from the wotlk 3.3.5 addon Cheese.
In order for it to properly function you just have to do a few things before:
INSTALLATION MANUAL:
Step 1: Go to CurseForge (app or website is fine) and download the ProcTextures extension: https://www.curseforge.com/wow/addons/proctextures
Step 2: Import the WeakAura
Step 3: Enjoy your textures :D
INSTALLATION MANUAL (OLD):
Step 1: Download this zip-file with the textures:
https://www.mediafire.com/file/nyyt3ng71yq1iha/ProcTextures.zip/file
Step 2: Copy over the folder from the zip-file into your addons folder
Step 3: And you're done! Just import the WeakAura and everything should as it should