Your body becomes immortal. Even turning to ash, you'll recover. Your regeneration is incredibly slow, and you require nutrition, either from the soil or from actual food sources. Your regeneration would take hours to heal cuts, but days to reconnect limbs.
You're able to shrug off most wounds. Your capabilities with bukijutsu are even more impressive, allowing you to fight veteran shinobi with an intentionally terrible weapon and even win.
Your main power, though, is a ritual. You can create a ritual circle and after ingesting blood of an opponent, you will reflect all damage you take onto them like a voodoo doll. This damage surpasses defenses, even soul or magic, and causes extreme pain on the other side.
You will not need to worship Jashin.