Like most Pokmon cards, the value of Vullaby depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Boundaries Crossed)
Every card in the Archenemy Set is printed on German black core paper, identical in weight, size, and thickness to authentic Magic: The Gathering cards
As always, focus on Islands if all five lands are roughly equal in price
Its important to know that the actual act of tapping another creature, or enlisting that creature, doesnt use the stack, but the trigger that pumps your enlist creature will use the stack
This is a rare breed because it's hard to stay centered between all three desires
This is a card that I rarely ever see in other people's decks but one I think more people should play