I can say that the most extreme curse I’ve ever thrown was simply thrown as an energy ball (I call it a fire ball) - actually about 5 of them, several times, towards the guy, who lived in my complex. Notably, I was visualizing one apartment over from where he actually lived; but, it hit him, anyway. It’s really about intention.
Up to that point, cursewise, I had only ever “decided” that something would happen, and it did, which, when the thing was unpleasant or inconvenient for the target, I could call a curse. This time, it was very, very intense, and I was very very angry. (The man had poisoned the feral cats here, and continued to kill them, one by one (there were witnesses, but I never caught him on camera, so Humane and the cops refused to do anything). The cats were my friends; plus, I really do feel hate towards evil people.
This is my caveat, and what I’m about to begin working to perfect - there are ways of containing the energy so it only hits the target, and one needs to be careful to do this. I was lucky, in that his car accident (which happened about 2 weeks later) didn’t kill him (I didn’t need the karma). But, my car also experienced a burst tube, or whatever you call those things. Hose? And, he was evicted about 3 months later (which is about how long it usually takes me to make someone move away, by taking “the decision”, which has to arise naturally, but banefully…I don’t TRY to do it; I just feel it, stamp it with approval, and then it happens). It was well worth it, but I want to get better at containing the curse, because I need one, now, for another similar situation (a sucky person causing problems for multiple people, and no “real world” solution) and I want a specific outcome, not just some inconvenience.
I might enlist the help of an entity. I plan to consult some. But, the anger is welled up and I’m storing it in a golden ball. Hopefully, it will stay there until I apply it to a construct, maybe a sigil, in a spell.
I think there’s a built-in safeguard against pettiness. Firstly, one has to really have the energy in the form of either anger or empathy for a vic (which can be turned against a perp); and, this only comes naturally. Secondly, If our deeper Self knows that we are being petty or greedy or jealous, it will poke holes in the vessel of intention. At least, this is my hope and belief, maybe it’s a bit “3 fold rule” for some. But, I’ve met the Judge - the inner part of the Self that is all knowing and gives no quarter. It’s like a sold steel statue, staring back at us. We can’t fool ourselves, at the deepest level.