The Firstlight Tanto Schematic is a Mythic unlock buried in the snow of Iceveil Valley, and the chest holding it only cooperates if a short night-time chain is done in the right order. A second reward sits in the middle of that chain, the Legendary Mushroom Lit Lantern, and it is the only light source in Slayers 2 that reveals the trail to the dig spot.
Quick answer: Buy the Shovel after finishing Shiro’s supply quest, pay Old Trapper Retsu 2,500 cash at night, unequip every lantern, light all the blue cave mushrooms, then dig where the footprints stop.
What the Firstlight Tanto route pays out
Two items come out of the chain. The lantern arrives first and is worth keeping equipped long after the quest is over, thanks to its movement speed and stamina regen multipliers.
| Mushroom Lit Lantern | Value | Firstlight Tanto | Value |
|---|---|---|---|
| Illumination | +0.45 | Additional Damage | +5.75 |
| Max Health | +20 | Additional Damage Factor | 1.15x |
| Max Stamina | +15 | Point Points | +8.3 |
| Movement Speed Factor | 1.05x | Block Regen | 2.36x |
| Stamina Regen Speed | 1.07x | Max Stamina | +45 |
The high additional damage and the +45 Max Stamina are what push the tanto to the top of the slayer weapon list, while the block regen multiplier keeps it usable in long fights where you spend a lot of time guarding.
Requirements that gate the chain
Four requirements determine the entire sequence. If even one is missing, the mushrooms, footprints, and buried chest remain inactive.
- A Shovel must be in your inventory; it is sold only after completing the Iceveil village supply quest.
- It must be night in-game, as Old Trapper Retsu appears only during those hours.
- Bring 2,500 cash or more to pay Retsu for the information.
- For your initial cave visit, leave every lantern and other light source unequipped.
Iceveil Valley inflicts cold damage unless you have protection. The Emberheart Lantern grants Cold Immunity; the Yeti Demon in the White Terror Lair drops it, and campfires in the region recharge it instead of occupying an active slot.
How to get the Shovel in Iceveil Village
Finding the dig spot ahead of time does not bypass the requirement. The buried chest stays unopened unless the Shovel is equipped, so handle this step first.
Pay Old Trapper Retsu at night
Everything from here has to happen after dark. Starting the Retsu conversation during the day does nothing, so wait out the clock at a campfire if you arrive early.
Light the blue mushrooms and take the Mushroom Lit Lantern
Rejoining resets the cave, but it also resets the time of day, so check that it is still night before walking back to the mushrooms.
Follow the footprints and dig up the schematic
The result is confirmed when the Mythic-tier schematic appears in your inventory and the Firstlight Tanto record in the Archives menu can be read, including its complete stat block and description.
Farm the Firstlight crafting materials
The schematic grants the unlock rather than the completed blade. You can obtain Firstlight materials, including Firstlight Weaver’s Silk, from two repeatable sources. A patch also reduced the material cost, making the grind shorter than at launch.
| Source | Base material chance | Cost or notes |
|---|---|---|
| World bosses and World Chests | 3% | Rotate bosses across regions |
| Dungeon end chests in Ouwigahara | 5% | 30,000 points per run |
World boss rotation
The simplest route is repeated boss farming. Start with Yahari and Reaper at Bamboo Grove, cross the bridge to Sumari, then include Water Breaker Hashira Giyen and Wind Slayer Saneri. Every kill provides a World Events Chest in addition to its normal loot, and the circuit ends with the first boss respawned.
Standard drops appear on the ground beside the chest, so check the floor before leaving. The Bamboo Grove bosses commonly provide Coin Pouches and Metal Scraps as filler drops.
You will find markers throughout Bamboo Grove, the Wilderness, and Windy Peak, plus a Black Marketeer marker on the map. Because every location has the same drop chance, build the route to minimize travel instead of maximizing boss kills.
Ouwigahara dungeon runs
Dungeons offer the better percentage. Join through the gate by the Queue Area in Ouwigahara, finish the run, and use 30,000 points to unlock the end chest, which has a 5% material roll.
Both 2x and 4x boosts increase boss-loot and dungeon end-chest drop rates. Get one from the shop before you begin farming, not after the session is underway.
With the schematic banked, the only thing left is material luck, and that part moves at whatever pace you set. Keep the Mushroom Lit Lantern equipped in the meantime for the speed and stamina regen it carries, and if you are sweeping Iceveil Valley anyway, the Firstlight Spear Schematic sits in an icy cavern reached by diving near the submerged statue where Doma spawns.
