Infinite healing? I've become an immortal poison healer

Ning Chuan transmigrated into a world teeming with magic and monsters—where raging demonic wolves breathed fire that razed towns, dragons in the far north froze thousands of miles with a single exhale, undying ghosts roamed freely, and frenzied undead slaughtered without mercy. At his graduation ceremony, Ning Chuan awakened as a D-rank priest and was met with ridicule from all sides. Yet he paid them no mind, for his class panel bore a Supreme Blessing. While others labored in multiplayer parties, painstakingly exploring dungeons and grinding levels at a crawl, Ning Chuan—empowered by his timeless buff—had already become an immortal healer with infinite mana and inexhaustible health. What followed was a sight to behold: a priest, wielding a cross-shaped longsword, charging headlong into melee against endless tides of undead, grinding them down through sheer relentless endurance. “Got any stronger attacks? You’re just tickling me. The damage you deal in a single second isn’t even as much as my health regeneration…”