I offer a service, to spell/ritual casters.
If you have experienced a failure or some other problem casting. I have the skill/ability to (trouble shoot) it. <for free>
I need the Time, Date, and a (recent) picture (of some part) of the caster, for thier Energy Signature.
With this information, I can (insert) myself (astral form) into thier personal Time Stream. And then (view) the problem. Second by second, and discuss/notify of what happened.
If I DO this within a week of the event. I can change/fix the problem, (with the caster's Permission).
Anything beyond a week, there is too much (inertia) in the Time stream, to make changes.