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DOTA 2 - There are two types of wards in Dota 2. At the left side is observer ward and the right side is sentry ward. Observer ward is used to give a small vision in your map while sentry ward is used to detect any invisble units or heroes.

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There are two types of wards in Dota 2. At the left side is observer ward and the right side is sentry ward. Observer ward is used to give a small vision in your map while sentry ward is used to detect any invisble units or heroes.