I have been collecting Pokemon cards since 1999, and these symbols has stayed the same ever since, but there has been some new additions over the last few years
Creatures with ravenous feature an X casting cost, but they allow you to draw a card when they enter the battlefield if X is 5 or more
Cards like Teferis Moat, Raking Canopy, Elephant Grass, Ghostly Prison, Arcane Denial, Mindclaw Shaman, Syphon Mind, Relic of Progenitus, and Nevermore can play different roles in stopping a certain type of plan or play from coming to fruition
As far as making these big cull choices it is all about how much play a card gets
The subtitle of "Mischievous Pals" seems to fit the duo well, particularly with the card's ability, Sleight of Hand
As a card, it's solid, letting you flood the battlefield with copies of Assassins in exile with memory counters