Nerf / buff specific spell

Hello once again community! Thanks for all ur help so far, it’s really appreciated… I’ll pull out another hand to get caught! …

So my problem is that I can easy buff / nerf a creature npc through World.conf and edit the rates on HP, AP damage, melee damage and so on... Look at: Uploaded Images to see an example!

So my question is am I able to burf nerf specific creature spell to do less / more dmg and how so? 
An example could be Razorscale's Devouring Flame!  :) 
Thanks guys

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@CDawg @Ibeatdungeon you got a solution for this?

I believe that the spell.dbc for 64709, 64734 are pretty fixed without modification, like any other spell. I don’t think you can mess with that in spell_dbc and get that to change for client interaction stuff.

I also I don't know a way of:

SetDamageModifier(-50%)
DoCast(target, SPELL_DEVOURING_FLAME);  
SetDamageModifier(+50%)

You could easily change the fight parameters and make the Razorscale cast the spell more or less frequently.

https://github.com/TrinityCore/TrinityCore/blob/3.3.5/src/server/scripts/Northrend/Ulduar/Ulduar/boss_razorscale.cpp#L585

You could always drop different spellids entirely instead 64709, 64734 of like Elder Moonstones 21745 or something.

Finally:

https://trinitycore.atlassian.net/wiki/spaces/tc/pages/2130124/Spell+system

You can actually edit the DBC files by hand to add, delete, or edit any abilities, however you will also have to create a patch for the client side to understand those changes.

For example on my server I changed blizzard, rain of fire, and hurricane to have cast times instead of being a channeled spell.

Stoneharry made a very easy to use spell editor exe to help people