2014's Khans of Tarkir repurposed Spelljack as the triggered ability on Kheru Spellsnatcher, one of the best 'gotcha!' morphs in Magic
Lumra, Bellow of the Woods is a Standard-legal behemoth with an incredibly powerful effect, which makes it relevant to many players
You can buy a box of 30 packs instead of individual boosters with their own buy-a-box promo as incentive
The -8 is achievable two turns after Tibalt hits the board, and it basically lets you play with everyones graveyards for the rest of the game
Many quests and objectives deemed to be unnecessary have been removed from the main story quest for new players, especially in patch content for A Realm Reborn
She even bears more than a passing resemblance to my favorite card in casual Commander, just with the addition of black to help enable her to do her thing even better