The Mapinguari was once a guardian of the Amazon rainforest who witnessed the devastating aftermath of a previous Phoenix rebirth cycle that scorched vast regions of its homeland. Discovered in the charred remains of an ancient temple by Zephyr Shadowcloak, the creature's natural resistance to fire was enhanced through ancient rituals that transformed it into the perfect counter to Phoenix energy. Its hatred of unchecked flames and commitment to preventing further destruction made it a willing and formidable ally of the Obsidian Sentinels.

The Mapinguari Extinguisher possesses an internal chamber that can absorb and neutralize Phoenix energy, drawing flames into the mouth in its abdomen where they're extinguished by a mysterious dark substance. Its thick, fireproof hide is embedded with obsidian shards that resonate with and disrupt the frequency of Phoenix flames, creating zones of cold darkness wherever it travels. The creature's single eye can detect Phoenix energy across vast distances, allowing it to track and intercept the Ashen Pilgrims before they can reach sacred sites crucial to the rebirth cycle.

The Mapinguari Extinguisher serves as an elite operative for the Obsidian Sentinels, deployed at critical junctures to intercept the Ashen Pilgrims and extinguish sacred flames that would guide them to the Phoenix's nesting sites. It acts as a direct counter to fire-based entities within the Ashen Pilgrims' ranks, creating strategic dead zones where Phoenix energy cannot accumulate and thus preventing the critical mass needed for rebirth.