To read a full in-depth breakdown of Gym Leader Challenge and get some ideas as to what a Gym Leader Challenge deck looks like, check out the Side Event Breakdown: Gym Leader Challenge article on Pokemon.com
Contents: 9 Play Booster Packs 1 Collector Booster Pack 15 Foil Lands 15 Regular Lands 5 Regular Promo Cards 1 Themed Clickwheel 1 Setup Box Limit 2 per customer
However, now that the environment has become faster, it hurts to use summon power, and the adoption rate of the Book of the Moon itself has declined, so I don't see it much
Ultimately, the card is much weaker than its obvious inspirations, but its also much less likely to get you uninvited from Commander night
It was only available inside random booster packs of the SM#1 Sun & Moon "Collection Sun" series that was released in Japan, in December, 2016