For example, they might shut down Abilities (ability-lock), prevent Item cards from being used (item-lock), or stop Pokmon from attacking
For example, Shalai, Voice of Plenty gives its controller hexproof, which means you can't simply Settle the Wreckage away your opponent's creatures
"Realistically, the actual award number produced is not going to reflect the number that's going to be available for sale." As noted earlier, the most desirable trophy cards are the 1997 Pikachu singles, which were the first trophy cards ever awarded at the official Pokmon tournament in Japan
The synergies that defined each 2-color pair varied, with some remaining the same, like Gruul Werewolves, and others shifting completely, like Orzhov Tokens vs Orzhov Lifegain
More information regarding the entire set can be found on the Wizards of the Coast website.
With seven cards in the SIR line, TCGPlayer states that there is a one in 32 chance of finding one of these cards, although that number jumps to one in 225 if searching for a specific one, such as this Giovanni's Charisma card number 204/165