Here we have a sweet Near Mint The Tabernacle at Pendrell Vale and a Good Chains of Mephistopheles
Like all Sagas, it enters the battlefield with one lore counter, and at the end of each of your draw steps, it gains another and activates the next ability on its list: The first ability triggers as soon as Fable of the Mirror-Breaker enters the battlefield, and makes a 2/2 red Goblin Shaman that makes a Treasure token whenever it attacks
To help us with this process, we always clump creatures together in the first part of the numbering
The flavor text quote from the actual book lining up with 21 commander damage makes for both a book and EDH rules flavor win
While a more common problem with booster packs, some sellers have also tried getting away with resealing the shrink wrap or plastic outside a booster box, and some even go so far as to replicate WotCs own packaging
Regardless, this might be an interesting direction to take the deck if you're not interested in the Graveyard Spellslinger theme