Quick answer: Mechanical Gear is in a chest on a wooden scaffold on the cliff near the Red Serpent House bell in Crimson Forest. You reach it from above by the plank road and a ladder. Quick Hand Zhang also sells it for 1,040 Remnant Dust.
What Mechanical Gear does
Mechanical Gear sits under the “Phantom Edge Upgrade Materials” category. Its item card reads: “A gear connected to a bearing. Its teeth interlock like a woven pattern, turning smoothly in unison. A fundamental component of Engine Art. Upon this foundation, countless mechanisms can be created, making it highly suited for Artifice weapons and devices.” The effect line reads: “Required to upgrade Artifice-type Phantom Edges to Lv. 10.”

At a bell, choose Upgrade Equipment to improve Phantom Edges, the same screen used to upgrade weapons. Their individual material requirements apply through Lv. 10.
| Phantom Edge type | Material up to Lv. 10 |
|---|---|
| Martial | |
| Destruction | |
| Artifice | |
| Ranged |
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The chest is in Crimson Forest during Chapter 1. You can’t reach it from the road below. The only way in is from above, by the plank road, the plateau and a ladder.






Buying Mechanical Gear from Quick Hand Zhang
Quick Hand Zhang‘s Crimson Forest hideout stocks Mechanical Gear in the Buy tab for 1,040 Remnant Dust each, with 6 in stock. Select it and hold Space to buy. He also carries it at his Village of Lu, Pangzhen and Meigu Village hideouts. Earn the Remnant Dust for it from enemies and pickups.

Precision Mechanical Gear and Ying Mechanical Gear
Mechanical Gear only takes Artifice-type Phantom Edges as far as Lv. 10. Two more gears cover the rest of the climb.

| Material | Artifice-type levels | Quick Hand Zhang price |
|---|---|---|
| Up to Lv. 10 | 1,040 | |
| Lv. 10-20 | 1,240 (Pangzhen, Meigu Village) | |
| Lv. 20 to max | Not in his stock |
The PRECISION MECHANICAL GEAR card reads: “Carriage drivers use it to adjust wheel spacing, weavers to alter gear ratios, farmers to draw water, and merchants to weigh their goods. Drawing on the ingenuity of countless trades, this precise and practical device came to be.” Its effect: “Required to upgrade Artifice-type Phantom Edges from Lv. 10-20.”
The YING MECHANICAL GEAR card reads: “For generations, the Ying lineage has studied Engine Arts, devoting itself to mechanical weapons and armor. Gears made by their methods house delicate mechanisms within tough, sharpened rims, adjusting their motion to attack, defend, or turn an enemy’s force to their advantage.” Its effect: “Required to upgrade Artifice-type Phantom Edges from Lv. 20 to max level.”






