This set was incredibly unique, not only because the addition of a new Pokemon generation, but the entrance of EX and gold star cards
The discover value equals that creature's toughness, letting you exile cards from your library until you find something with that mana value or less, then cast it for free or put it in your hand
My current view actually disagrees with myself from 5 years ago
Arven has reigned as king as one of the most played Supporters across the era just due to how consistent its draw power is
Other expensive cards include, not surprisingly, iconic main characters like Sephiroth, Cloud, Lightning, Terra, and Clive, as well as summons like Knights of the Round and Bahamut
It's a powerful defensive play, especially in multiplayer games where you need to protect your board from surprise wipes or game-ending effects