silver tempest card sleeves Pokémon TCG: Sword & Shield-Silver Sleeved Booster Pack (10 Cards) Silver Tempest Elite Trainer Box

In other TCG-related news, check out the Path to the Peak card from Time Gazer [S10D]

There is the official Pokmon Trading Card Database, which will help you spot any text or stat differences, but isn't great for differentiating colors (since your monitor may not precisely match the colors a printed card would appear in your room), and of course it can't help you with determining the feel of the card

But for how much

Legality depends on the tournament format -- Reckless Stormseeker // Storm-Charged Slasher can be legal in some formats and banned or restricted in others

b [4] However, it is unknown if this tactic was only possible via his Deck Master's ability