These V and VMAX Pokmon cards replace the old Gx cards from SUn and Moon era, and are the new type of ultra rare and secret Pokmon cards of Sword and Shield series
But thats felt less and less common, so now use as more of a 1 of that can tutor for with Oracle
Obviously stealing planeswalkers can be very powerful, especially if you can ultimate them right away, but Callidus Assassins flash, as well as the fact that it destroys the creature rather than having your opponent get it back when it leaves the battlefield, are significant as well
Then permanents entering under your foe's control cannot get ETB triggers
Set symbol: This part of the card tells you its rarity (shown by the color) and which MTG set it is from (shown by the symbol)
Speaking of, its all about Commander precons today