Items / Gem of True Sight
Gem of True Sight costs 900 gold in Dota 2 patch 7.41f.
Gives True Sight over a 300 radius revealing wards and units even in Fog of War.
Grants the ability to see invisible units and wards to any allied vision within 900 range of its carrier.
Dropped on death, and cannot be destroyed.
Disabled while on a courier.
Not one thrall creature of the depths, Nor spirit bound in drowning's keep, Nor Maelrawn the Tentacular, Shall rest till seas, gem comes to sleep.