Sell to the Wanderer — 150 
Khron/eahow it works
Portal → 
Heart of the VeilHeart of the VeilContinent 52 different echoes to track2 different relics to dig upIts boss is Veil Avatar (×54)how it works
Craft 
Tracking CompassTracking CompassGear
MundaneThe Wanderer (Mundane) — 675 KhronTiers 2-4: CRAFT it (materials + Khron)Unlocks TRACK (echoes + Hunter's Mark) Supreme (×740)how it works- Craft
Digging ClawsDigging ClawsGearMundaneThe Wanderer (Mundane) — 675 KhronTiers 2-4: CRAFT it (materials + Khron)Unlocks DIG (relics + War Horn) Supreme (×370)how it works
It is the mortar of the home stretch. The Supreme Tracking Compass asks for 740, the Supreme Digging Claws another 370, and the Portal to the Heart of the VeilHeart of the VeilContinent 52 different echoes to track2 different relics to dig upIts boss is Veil Avatar 54 more — with 640,000 Khron per tool on top.
It is worth separating the two bills, because they do not weigh the same. To CROSS, those 54 are enough: the final portal demands the Sublime Compass and Claws, not the Supremes. The remaining 1,110 are the endgame's clock — without the Supremes you stay at 20-30 units per find instead of 40-60, and that jump is what multiplies everything after it.
Selling it at 150 Khron is perfectly legal, and the Wanderer's supreme cap is 12,000 units a day at full rate; but you are selling the ladder: every unit you let go before hitting 1,164 is a unit you will have to track down again.
Echo · tracking
Dunes of Oblivion
Tide Echo
Heartbeat Echo
Ash Echo
Umbral Echo
