Surveyor's Scope

{T}, Exile this artifact: Search your library for up to X basic land cards, where X is the number of players who control at least two more lands than you. Put those cards onto the battlefield, then shuffle.

Commander Anthology

{T}, Exile Surveyor's Scope: Search your library for up to X basic land cards, where X is the number of players who control at least two more lands than you. Put those cards onto the battlefield, then shuffle your library.

Commander 2013

If no players control at least two more lands than you when the ability resolves, you'll still search and shuffle your library.

You count the number of players who control at least two more lands than you when the ability resolves.