While all the cards in the set would be in the future retail release, they had a unique foil finish exclusive to the D23 Expo Collectors Set
This can be used to generate political advantage in multiplayer games, as you can make non-aggression agreements not to tap a flying threat for as long as it doesnt attack you
Those creatures don't untap during their controllers' untap steps for as long as you control this creature
While Commander as a format has a great host of counter synergy, alongside older Hydras to benefit from them, those decks can often suffer from creating immense stacks of power and toughness without any way to actually benefit from them
Few of them, however, required as much time, effort, and gas money as the Japanese version of Umbreon Gold Star , a promotional card with a lot of story behind it