why do some pokemon cards have yellow border

why do some pokemon cards have yellow border Are these stains on the of my vintage cards? Or just this as part of the design? (Secret wonders Mew) : r/PokemonTCG Card borders are different shades

Name: why do some pokemon cards have yellow border Are these stains on the of my vintage cards? Or just this as part of the design? (Secret wonders Mew) : r/PokemonTCG Card borders are different shades
Brand: ana-nursing.co.uk
SKU: 41752999820
Price: 21.88 USD
Availability: InStock
Rating: 4.3627 (28 reviews)

SKU: 41752999820

4.4

USD21.88 USD58.88

Pay in 4 interest-free payments of $5.47 Learn more

Shipping Estimate
USA

USA

CAN

Ships within 48 hours · Estimated delivery Jul 29 - Aug 3

Description

In Collector boosters, the FCA card is a traditional foil 50% of the time

Replicating Ring

3 Darkness Energy: Burning Shadows (168/147) - $35.90 Not Ultra Rare, Just Ultra Cool

The other, more contentious general to receive the moniker of Voltron general was Geist of Saint Traft

This battle is truly sad

I think Im correct in saying that this is the cheapest (in terms of mana cost) one-sided card draw doubling effect we have now, so although it doesnt double your normal draw step, this is a no-brainer to slot into most blue decks