The frosty caverns of Jarilo‑VI are humming with excitement once again. In August 2026, the Underground Treasure Hunt event surges back into Honkai: Star Rail, inviting Trailblazers to plunge into Belobog’s ancient underbelly. This revival is more than a simple rerun – it’s a treasure-drenched labyrinth where every decision feels like moving a pawn across a clockwork game board, a board whose gears turn sharper the deeper you delve. Picture a puzzle box built by a long‑gone civilisation: each solved chamber reveals a glittering prize, but one clumsy flip can set off a cascade of draining exhaustion.

The event structure remains a meticulous dance between exploration and resource management. Five ancient ruins lie hidden beneath Boulder Town, each laid out like an oversized board game. Every square your party touches could unveil a cache of Stellar Jades or trigger a fight. The real tension, however, comes from the stamina system – each step costs a point, and once your reserves evaporate, your team’s health starts melting away. It’s a balancing act reminiscent of a tightrope walker who must also juggle flaming torches; losing rhythm means catastrophe. Two difficulty layers await: Surface Exploration, which acts as a tutorial map, and the punishing Deep Exploration, unlocked only after you’ve cleared the surface version of the same ruin.

To even glance at the entrance, you’ll need to have finished the Trailblaze Mission Jarilo‑VI — Silent Galaxy. With that done, the Underground Travelogue quest will guide you to the Miner’s Lamp in Boulder Town, where the NPC Balaway briefs you on the situation. From there, a quick trip to the Great Mine introduces you to Aksay, and the hunt officially begins. The 2026 edition runs through August 28 at 03:59 server time, giving you a comfortable window to conquer all five ruins.

What makes the grind worthwhile is the spoils. Completing every stage and uncovering every secret yields a haul that can make even the most stoic Trailblazer smile:

• 💎 1,000 Stellar Jades

• 📚 60 Traveler’s Guides

• 🖤 18 Obsidian of Obsession and 69 Obsidian of Desolation (Nihility Trace Materials)

• 🏺 200 Relic Remains

• 💰 600,000 Credits

• ✨ 1 Tracks of Destiny

• 🔧 1 Self‑Modeling Resin

• 💬 “Where’s the Rabbit?” Chatbox Modifier

Now for the heart of the operation: the ruins themselves. Each of the five dungeons behaves like a distinctive organism, pulsing with its own boost, trial characters, and boss threats. Learning each ruin’s quirks transforms the hunt from a blind stumble into a surgical strike.

Ruin	Trial Characters	Unique Ruin Stat	Boss Enemies & Potential Foes
Ruin 1	Kafka, Luka	DoT Boost	Automaton Grizzly, Automaton Direwolf, Automaton Spider, Automaton Beetle, Automaton Hound
Ruin 2	Silver Wolf, Sushang	Break Effect Boost	Ice Out of Space, Blaze Out of Space, Frostspawn, Flamespawn, Mask of No Thought, Everwinter Shadewalker, Voidrangers, Imaginary Weaver
Ruin 3	Jing Yuan, Tingyun	Follow‑Up Attack Boost	Frigid Prowler, Searing Prowler, Vagrants, Automatons, Imaginary Weaver, Incineration Shadewalker, Decaying Shadow
Ruin 4	Blade, Luocha	Basic Attack DMG Boost	Guardian Shadow, Decaying Shadow, Shadewalkers, Spawns, Silvermane Guards
Ruin 5	Kafka, Asta	DoT Boost	Svarog, Automatons, Trotters, Decaying Shadow, Vagrants, Shadewalkers

Ruin 1 is your introduction to poison‑soaked chaos. The DoT Boost turns Kafka and Luka into ticking time bombs for enemies. But the board itself is a snarled web: enemy tiles will seal off adjacent squares, restricting your path. It’s like navigating a hallway where the walls occasionally snap shut. Pair the trial characters with additional DoT specialists like Serval or Sampo to melt anything that stands in your way.

Ruin 2 flips the script with Break Effect Boost. Silver Wolf’s ability to implant elemental weaknesses makes her a master key, opening doors for your whole team to shatter enemy bars. Here, a secondary mechanic punishes dawdling – every three steps you take, enemy tiles drain your party’s stamina. Consider it an invisible countdown laced with venom; move with purpose or bleed out slowly.

Ruin 3 grants a Follow‑Up Attack Boost, transforming Jing Yuan, Himeko, and Herta into sirens of destruction. However, the twist here is a reverse snowball: the more unflipped tiles you leave behind before engaging a battle, the stronger your opponents become. This turns each step into a high‑stakes gamble – reveal too little and face a boss that hits like a freight train; reveal too much and risk stamina burnout. A measured pace is your safest ally.

Ruin 4 favours Basic Attack damage. Characters like Blade and Qingque can chain devastatingly simple strikes. Meanwhile, treasure‑shaped Trotters skitter across enemy nodes. Each Trotter carries a vanishing countdown, and missing one feels like watching a winning lottery ticket dissolve in your hands. Smash them quickly for an extra injection of rewards.

Ruin 5 is the grand culmination, returning to the DoT Boost of the first dungeon but splicing in every challenge you’ve already overcome – tile blocking, Trotter pursuits, and a relentless final clash against Svarog. Your roster of DoT dealers gets a second spotlight, but the stage demands flawless execution. Think of it as a mosaic where every earlier lesson forms a single, unforgiving picture.

When you emerge on the other side with pockets full of Stellar Jades and a shiny new chatbox modifier, the Underground Treasure Hunt will have felt less like a routine event and more like a masterclass in tactical exploration. So equip your best DoT catalysts, break‑effect enablers, and a cool head – the riches of Belobog’s depths are waiting for a planner who can see the board three moves ahead.