Certain abilities and items can make heroes invisible and cannot be seen without special abilities. The special abilities to see the invisible unit is what we called "True Sight" What gives True Sight? Sentry ward Placing the Sentry ward will create true sight vision around the Sentry ward and allow to see the invisible unit Before placing the sentry ward After placing the sentry ward Dust of appearance Using dust of appearance reveals the invisible unit nearby and slow their movement speed by 20% Before using the dust of appearance After using the dust of appearance Gem of true sight Heroes that carry the gem of true sight will carry the true sight vision around them, Before carrying the gem of true sight After carrying the gem of true sight If the hero that carries the gem dies, the gem of true sight will drop on the ground. The dropped gem will still grant true sight to the team that originally carry it until being p...