Sully, Excursion Planner

Whenever a creature enters the battlefield under
your control, you may choose a nonland card
name. If you do, reveal the top card of your
library. If that card has the chosen name, Sully, Excursion Planner explores.
Whenever a creature you control explores, create
a Treasure token. (It's an artifact with "{t},
Sacrifice this artifact: Add one mana of any color.")
"Preparation is the first step to an excursion."