A card like that should always be celebrated, in my opinion
Its Darkness Fang attack costs two darkness energy and deals 80 damage, while its Dark Claw ability allows you to switch one of your opponents damaged Pokmon into the active spot (though it only works while Umbreon ex is also in the active spot)
For example, if you have a Gengar, you dont need to chase the Gengar ex or Gengar Full Art
The most popular and most expensive example of a rare holofoil card from the first Pokmon TCG set is the famous Charizard Holo, which was printed using the popular Cosmos holofoil pattern and features iconic artwork by Mitsuhiro Arita
Our Spirits Are Different: The Duel Monster Spirits
It has a lot of potential, especially moving into the next phase of the Magic story, which we know will have dragons featuring pretty highly