This DotA 2: Farming and Warding walkthrough is divided into 11 total pages.
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Ward Range
Observer ward have 1600 range which is quite large for the game. It can't reveal any area higher than the ground it placed. So, the higher you put the ward, the larger area you will see.
Sentry ward range about half of observer ward range = 600.
More DotA 2: Farming and Warding Walkthroughs
This DotA 2: Farming and Warding walkthrough is divided into 11 total pages.