Oh yeah, I fully understand that so many was to do something like this are better. You’re using a 6th level spell, a 3rd level spell, a 1,500 gp component, and using up your contingent spell on this just to get back ½ of 3d10 on a hit.

This is about one of the least broken healing tricks you can do in 5e, but so many people are going out of their way picking at minutia or saying “Here’s how I’d houserule this to stop that trick” (essentially admitting it works fine without DM fiat to counteract it) without considering that life transference is infinitely better and also fails to exclude yourself a viable target for healing. Or just polymorphing yourself, or putting yourself in a resilient sphere before you take the damage is perfectly valid, strictly better and still an utter waste of a contingency.

Just FYI though, this is what being creative with spells actually looks like. Coming up with a weird unforseen non-RAI use-case and implementing it within the bounds of the actual words of the spells. Not reading the name of the spell and saying, “I create water inside his lungs, instantly drowning him. (Pls don’t look up suffocation rulez. thx” or “I heat the metal calcium in his bones, lol.”

All that aside, it looks like my pot stirring was a bit more successful this go ‘round. If I got some people to sign up to argue with me and migrate away from that site I used to use before it became enshittified beyond human tolerance, my purpose was served.