Deep beneath the canopies of southern Karamja, where ancient roots choke the remnants of long-lost civilizations, a new threat has awakened. Buried within the crumbling Ruins of Mokhaiotl, the latest boss in Old School RuneScape evolving endgame content is not just a relic of ancient blood magic-it's a mutation of terror itself.

The New Nagua variant-a serpentine horror born of ritual, stone, and jungle wrath-has slithered into the world, offering a brutal solo PvM experience for high-level adventurers. Unlike its original water-dwelling counterpart, this evolved Nagua thrives in dry, shadowy tombs. It guards a forgotten ceremonial weapon of the Aztlani people:the Earthbound Tecpatl, a jagged, rune-etched dagger capable of bending earth and bone alike.

Players first learned of the New Nagua variant through a mysterious crack that appeared in the lowest chamber of the Doom of Mokhaiotl Delve, introduced earlier this year. After defeating Mokhaiotl, some adventurers began hearing faint hissing echoes through the walls-sounds that didn't match any mechanic or ambient effect in the Delve.

Two weeks later, a hotfix quietly opened a new passage:The Hollow Fang, a tunnel leading to an unearthed ritual site, where long-extinct tribes once tried to tame the raw forces of the jungle. The broken totem in the center still bleeds faint magical light, and lying coiled within the shadows is the corrupted Nagua-no longer a mere water serpent, but something ancient, cursed, and bound to the land itself.

The New Nagua variant introduces a unique three-phase solo encounter that blends puzzle-solving with brutal precision PvM. The fight takes place in a circular arena made of cracked, uneven stone plates. Throughout the battle, the environment shifts, creating movement-based challenges and terrain hazards.

Phase 1-Ritual Awakening

Nagua emerges from the ground, cloaked in earthen armor. It fires venom spikes in a rotating cone while slamming its tail to collapse tiles. The catch:some tiles reveal glowing runes. Standing on them dispels the serpent armor-but at the cost of a magic drain effect on the player.

This phase is all about positioning. Players must dodge projectiles while memorizing safe tile patterns and baiting Nagua into line-of-sight exposure.

Phase 2-The Serpent Fractures

At 60% health, Nagua lets out a piercing shriek and splits off a fragment of itself-a stonebound shade serpent that mimics the player actions with a delay. Mistime your steps, and your own shadow can deal heavy melee damage or block key escape paths.

Here, the boss begins to tunnel, only emerging to lash out or cast earth-rending spikes. Players must balance attacking the main body while kiting the echo-serpent around the arena, making use of fallen tiles as traps.

Phase 3-Earthbound Rage

At 20%, Nagua fuses with its stone echo, gaining increased speed and unlocking its signature move:Rattle of the Deep. The entire arena quakes, and a rapid sequence of light pulses predicts where massive spines will erupt seconds later. It becomes a deadly rhythm game-one mistake can cost everything.

Victory requires full stamina, high focus, and flawless movement. But the reward is worth the pain.

Nagua signature drop is the Earthbound Tecpatl, an ancient jagged dagger once used in sacrificial rituals by the Aztlani warrior-priests. It's not just a cosmetic prize-it's a meta-defining tool for agile melee users and hybrid builds alike.

Stats and Effects:

One-handed dagger (requires 75 Attack)

+52 Stab, +38 Strength

Passive:Groundsplitter-Each third consecutive hit applies a stacking debuff to enemy Defence and Magic defence (-5 per stack, up to -20).

Special Attack (50%):Chasm Fang-Deals 110% damage and causes a shockwave in a line behind the enemy, hitting additional targets for 50% damage. Functions like a cone AoE in tight spaces.

The Tecpatl strength lies in both PvM and PvP utility-shredding boss defenses quickly or pressuring multiple enemies in multi-combat zones. While its raw damage is slightly lower than other top-tier weapons, its debuffing synergy makes it a perfect companion to magic-heavy builds, tribrids, and duo partner setups.

Defeating the New Nagua variant also offers rare and cosmetic drops, including:

Jaguar Wraps-A unique glove cosmetic with animated stone-scale textures.

Fang Totem Fragment-Combine three to unlock a permanent Serpent Watcher teleport near the Hollow Fang.

Venomous Dust-Tradeable secondary item that can be used to poison select weapons with a rare earthborne venom effect (30% chance to stun on poison trigger).

The boss kill also counts toward a new Ruins of the Aztlani Slayer Task, added to high-tier Slayer Masters alongside abyssal and demonic task categories.

The New Nagua variant is a shining example of how OSRS continues to innovate within its old-school framework. A solo boss that leans on timing, memorization, and positional mastery, it adds depth without bloating complexity. Items needed in the game need to be purchased with gold coins. If you don't have enough OSRS gold coins, RSgoldfast will provide you with the gold you need when you need it! The Earthbound Tecpatl is a worthy prize-but more than that, the journey to earn it is a PvM masterclass.