There we go, I found a pretty easy way to locate the correct files! Just delete your cache, restart the game, wait for the enemy to use the attack you are looking for, quit the game and check your cache for the file names

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Here's Emerald Shoot:
"modpath"\magic\ff7\data\battle\special\hado\energy00_00.png
"modpath"\magic\ff7\data\battle\special\hado\energy00_02.png
"modpath"\magic\ff7\data\battle\special\hado\energy00_03.png
"modpath"\magic\ff7\data\battle\special\hado\energy00_04.png
"modpath"\magic\ff7\data\battle\special\hado\energy00_05.png
"modpath"\magic\ff7\data\battle\special\hado\energy00_06.png