The Nebelgast

Hiding
Whenever The Nebelgast or a nontoken Spirit enters the battlefield under your control, put an omen counter on The Nebelgast. Then create a 1/1 white and blue Spirit creature token with flying for each omen counter on The
Nebelgast.
Counters remain on The Nebelgast as it moves to any zone other than a player's hand or library.