Cartographer's Companion [The Lost Caverns of Ixalan]

Cost: 3 When Cartographer's Companion enters the battlefield, create a Map token. (It's an artifact with " 1 , T , Sacrifice this artifact: Target creature you control explores. Activate only as a sorcery.") Ever since the Fomori's attempt long ago to extinguish Chimil's light, the Oltec have taken extensive measures to never get lost in the Core.