It's a box set containing a pack with three of nine possible promo cards (each featuring a starter 'mon from different eras), two booster packs, and a sticker sheet
What this means more precisely is that Dredge is great against Burn, Grixis Deaths Shadow, Izzet Phoenix, Azorius Control, and usually most creature decks, and bad against fast combo decks Amulet Titan, Tron, Grishoalbrand, and Selesyna Hexproof
For example the common symbol has one side because it is circular
Each Generation introduces new Pokmon from the corresponding region and often brings about significant shifts in the games landscape with new card types and strategies
These boosters are aimed at players looking to open packs without drafting them
Think about how each card supports your strategywhether its combat damage, controlling the board, or setting up a combo