Zacian V Union doesn't have any abilities to offer, and its attack effects are pretty limited compared to other V Union cards
I mean, just think of what could happen if you had four Mana on turn two
The current titleholder of most valuable Gengar of all time goes to the Japanese Masaki Promo Holo from 1999, which received a TAG 10 grade, and sold for $101,260 through Goldin
If you do need to slow down the deck, the most sensible thing would be to tone down the control elements
Promo Cards are also generally (but not always) marked by a stamp of some sort on the right side of the image, as seen on the picture of Mankey above
Box mascots Lugia and Ho-Oh headline the booster packs, and over 200 new cards are joining the game