Heartbreaking true story😔

This is a long-form horror/revenge webcomic series called “Raging Revenge” (sometimes just tagged #dogrevenge) created by the artist DarkBox (also known as DarkBox Studio / darkbox_comics).
Plot summary (full story, spoilers obviously):
A cute little puppy is brutally tortured and killed by two sadistic young men who think it’s funny to feed dogs food laced with nails, needles, and glass, then watch them die in agony. They film it, laugh about it, and post it online for shock value.
The dog dies in terrible pain… but its soul doesn’t move on.
Instead, the puppy’s spirit returns as a vengeful, indestructible, supernatural entity that still looks like the same adorable dog on the surface (complete with happy “woof!” sounds), but now has glowing red eyes and god-like powers when it wants to use them.
What follows is an extremely graphic, over-the-top revenge story in which the ghost dog systematically hunts down the two abusers (and sometimes others involved) and subjects them to prolonged, creative, Saw-level torture that deliberately mirrors or escalates every single thing they did to animals:

Force-feeding nails and glass → the dog force-feeds one guy his own teeth and a nail-studded “sausage”
Kicking and beating dogs → the dog grows huge and crushes/kicks them
Filming animal abuse for fun → the dog now films the humans screaming and uploads it (implied)
Laughing while the animal suffers → the dog keeps an eerily cheerful, playful attitude the entire time, still wagging its tail and saying “woof!” while disemboweling them
Salt in wounds, electrocution, nail guns, power tools, fire, castration, face-skinning — basically every torture trope gets used

The dog is completely unkillable (bullets, fire, dismemberment — nothing works). Every time the abusers think they’ve won, the dog just regenerates or reappears with a happy “woof!” and continues the torment.
The comic ends with both men reduced to broken, mutilated wrecks, still alive and suffering, while the ghost puppy finally seems satisfied and walks away into the light, having achieved perfect karmic revenge.
Tone & style
It’s deliberately exploitative gore/shock horror in the vein of “Ichiens de vengeance” or “cute thing does extreme violence” internet comics (similar to “Happy Tree Friends” or “Mr. Pickles” but much darker and more one-sided). The extreme contrast between the adorable dog design and the ultra-violent content is the entire point — it’s meant to be cathartic for animal lovers and nauseating for everyone else.
The series was originally posted in episodes on Instagram/Twitter/Telegram by DarkBox around 2020–2022 and is still fairly infamous in certain horror-comic circles for how far it goes.
In short: it’s a pure revenge-porn fantasy in which a murdered dogs come back from the dead to slowly, cheerfully, and creatively tear apart their abusers in the most gruesome ways imaginable. Extremely NSFW, extremely graphic, and not even slightly subtle about its message.