You could use a damage detection system. Detect when spell damage is taken. If the target unit has the buff from your aura, deal extra damage. It would take more work because you would need to trigger all of your spell damage. But it would give you far greater control.
Dummy aura as you said with elunes grace works exactly the way you wanted it too, did you know if you use negative values you can get spells to heal enemy or allied units?
Just a idea if you thought of elemental damage as in fire vs fire.
I will be AFK for a couple of days you guys hold down the fort while I am gone. I will be checking in on my phone but that will severly limit me. Be back saturday!
I just got to watch the video because even though I was there I was trying to work out tech problems with the chat since I was the social media guy so I was distracted but check it out guys the video is super fucking great!
Looks like Google fixed whatever mistake that made the recipes on the site go crazy and we are no longer trending towards a recipe site lol - I don't care though because it motivated me to spend alot of time on the site improving it and at least now the content people are looking at is not stupid and embarrassing like it was when I first got back into this like 5 years ago.
They also were digging threw old shit at the sheriff's office and I tried to get them to give me the old electronic stuff, but they said no. They can't give it to people because they might use it to impersonate a cop or break into their network or some shit? idk but it was a shame to see them take a whole bunch of radios and shit to get shredded and landfilled