William Shatner asked his Twitter followers to take selfies of themselves doing the Vulcan salute Aug. 1, and it turns out he was asking for a reason: The former Star Trek star posted a photo of the late Leonard Nimroy made up of all the selfies Monday.

Shatner made the tribute as part of a task for GISHWHES — or, the Greatest International Scavenger Hunt the World Has Ever Seen — an annual scavenger hunt organized by Supernatural’s Misha Collins. See the final result below.

This article originally appeared on EW.com.

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