This game revamped the first title with many features that were present in the Ruby and Sapphire games
One of those was the Pokemon Trading Card Game , which received new types and card variants, such as Light and Dark Pokemon
In the end, you get to face-off against the best Pokmon trainers in the land, and also defeat an evil mega-corporation (Most Japanese role-playing games in the genre end up having the same basic plot, really)
It also means you can ramp up even more generously with cards like Migration Path and Vastwood Surge, which draw out two lands from your library instead of just one
1- Cast Shard of the Nightbringer for your ability make your opponent lose half their health rounded up, 2- By the ability of Wound Reflection your opponent will lose the other half of his life points
It ought to come as no surprise that the large majority of these cards will be useful for Assassin typal decks in particular