Currently, the most valuable Pokmon card is Pikachu, with some recently sold cards on eBay fetching $10-11 each, though most are selling for $6-7
The First Sliver A deck with The First Sliver has a heavy restriction since it only lets slivers cascade, but slivers are the creature type to benefit from this mechanic
Not only is Nashi a cheaper, sleeker Fallen Shinobi, but the ability to freecast from YOUR library opens the potential for control, which hampers other big Ninja payoffs
Attune with Aether was literally banned after about fourteen months of near continuous dominance of Standard
In rarity they are the silver circle, meaning Common , the tall, white chevron means Uncommon , the bronze triangle means Rare, the silver square means Super Rare , and the gold pentagon means Legendary
Restricted and Unbanned Cards There have previously been cards which are restricted, which means that only 1 copy of that card can be used in your deck