Ekko, Firelight Leader

Flying, Vigilance
Whenever Ekko, Firelight Leader attacks, it explores. If you reveal a land in this way, you may pay {g}. If you do, you may put that land onto the battlefield from your hand.
Whenever a land enters the battlefield under your control, if it is not the first land that has entered under your control this turn, create a 1/1 white Human Rebel creature token with flying.