Sentinel of the Nameless City - 383 R LCI Foil

Vigilance
Whenever this creature enters or attacks, create a Map token. (It's an artifact with "{1}, {T}, Sacrifice this token: Target creature you control explores. Activate only as a sorcery.")
"Halt, traveler. Whatever you seek, you will not find it here."
rare
Creature — Merfolk Warrior Scout
From the Magic: The Gathering set The Lost Caverns of Ixalan.