Atlas of Sarpadia

Whenever a spell with 3 or more colors in its
mana cost is cast, you may put an Artifice
counter on Atlas of Sarpadia and equip it to
target creature you control.
Whenever equipped creature attacks, you may
remove an Artifice counter from Atlas of
Sarpadia to search your library for a land card,
reveal it, put it into your hand, and shuffle your library. You may use this ability only once a turn.