All it does is make a card colorless regardless of the colors that appear in its mana cost, but it should have no real bearing on your decision-making process
If you go second, this attack does 60 more damage during your first turn
An extra 20 HP means that many of your Pokemon are safely out of dangerous situations that would normally be death sentences for them
We'll get into how they're different in a bit but first, here's the original product description from the Pokmon TCG : The Pokmon Trading Card Game: Collector Chest includes: 5 Pokmon TCG booster packs, 3 foil promo cards featuring Rowlet, Cyndaquil, and Oshawott, a cool Pokmon coin, 4 colorful sticker sheets, mini portfolio to store your favorite cards, Pokmon notebook, and a code card for Pokmon TCG Live
Silicobra (Pulsing Aura) is not available in Rare Packs
The best Every SIR Pokemon Card (Up until Prismatic) rankings are on the top of the list and the worst rankings are on the bottom