Each booster contains twelve randomized cards: 6 common cards 3 uncommon cards 2 rare, super rare, or legendary cards 1 foil card (random rarity level)
It was easy to imagine a turn 3 Gideon of the Trials making an emblem and then Pact of Negation being used to stop whatever potent play the opponent had to make, not to mention being able to make the same kind of play on turn 4 with a buffer in loyalty that meant that Lightning Bolt (already on the downswing as a card seeing play) wouldnt ruin your day
If Avatar Kyoshi stays on the board for multiple turns, your opponent will be buried under 6 feet of earth quickly
Not only did Vivi get banned in Standard, in part due to its interaction with Agatha's Soul Cauldron (although, as Wizards mentioned in its ban announcement, Vivi might have ended up broken even without its artifact friend), it's even more annoyingly strong in Commander, which I think is actually more damaging to the game overall
Lines of 45 minutes or more are being reported at some locations, which tells you two things: the card is drawing real foot traffic, and supply is getting hit hard
What cards are similar to Grim Initiate