Tarot Magic. Petr Krylov

you know the rest.

      4. And the story would see a happy ending but the darn dog (at this point, unlike other types of magic, causal magic churns out new scenarios of “if… then,” since the previous cause is now used up and not recycled), now fully recovered from the disease, turns out to be pregnant (or goes missing or gets kidnapped by the Criminals as the unique descendant of the dog bred by the legendary… add salt, sugar, and species to taste).

      5. And, strange though it may seem, help can only come from him as he happens to be into canine obstetrics, working exclusively with the dogs he operated on, or to know someone he went to school with who works at a detective agency, and it’s a sheer coincidence that today he’s having those Criminals over for his birthday party, and they promised they’d give him a dog for a gift…

      6. When the whole thing turns full circle three or four times, the patients take to staying overnight at each other’s houses, sharing beds, to spare themselves the trouble of coming over, or start to thrash violently in the trap of Karma, viciously tearing off their bodies everything sticking to them. Those too stubborn and stupid end up with their heads ripped off (basically, they don’t need those useless things anyway).