That +1 ability seems innocuous until you start combining it with fetch lands and alike, and the -1 has redefined what creatures are playable in Modern and beyond, where cheap, efficient spells are key
Look at the average price to determine your cards market value
Mardu Energy excels at flipping Sephiroth in mildly impressive boards, turning into an easy win condition that can double as card generation
When it enters, we can destroy an Artifact, Enchantment, or a Land
For the most part, the Worlds Smallest Magic the Gathering Duel Decks are just cool, collectable items
The skill is identifying which hyped cards hold value or which price drops are real bargains