pokemon xy booster box XY: Evolutions type Pokemon Pokemon Cards - XY -

The supply side is effectively identical from set to set

There are generally less of any graded Pokmon card in circulation than a raw card and potentially less available for sale or recently sold

Twilight Specter Rayrage (CORI-EN025) - Common - Chaos Origins TypeDragon / Pendulum / Effect Monster AttributeLIGHT Level / Rank3 ATK / DEF1000 / 1500 Card Text Pendulum Effect If a Pendulum Monster(s) you control would be destroyed

Once per turn (Quick Effect): You can target 1 monster you control

Some of the most useful ones are: Tamiyo's Safekeeping, Veil of Summer, Shardmage's Rescue, Surge of Salvation, and Snakeskin Veil

These are also potentially valuable, and can be identified more closely using the guidelines below