8 cards where the text includes “tap a land”

Deep Water (The Dark #23)
Harvest Mage (Nemesis #105)
Mirari's Wake (Commander Masters #928)
Nikya of the Old Ways (Ravnica Allegiance #193)
Regal Behemoth (The Lost Caverns of Ixalan Commander #251)
Savage Firecat (Odyssey #218)
Vorinclex, Voice of Hunger (Iconic Masters #189)
Zendikar Resurgent (Commander 2017 #160)

Though this query has ended, its relics still slumber in New Argive.