Guardian's Amulet 2049since 0.152.55 20 changes removed in 8.2.1
950g (475g base, 380g sell)
Active — UNIQUE Active - Ghost Ward: Consumes a charge to place a stealth ward that reveals the surrounding area for 3 minutes. A player may only have 3 stealth wards on the map at one time.(Unique Passives with the same name don't stack.)
Builds from: 
Ruby Crystal
Builds into: 
Ruby Sightstone
HealthVisionActive
Click any two patches to compare; the current range is shaded.
− Restores 10 Mana every 5 seconds. If you can't gain mana, restores 3 Health instead.
+ Restores 10 Mana every 5 seconds. If you can't gain mana, restores 0.6 Health instead.
− Restores 10 Mana every 5 seconds. If you can't gain mana, restores 0.6 Health instead.
+ Restores 10 Mana every 5 seconds. If you can't gain mana, restores 3 Health instead.