(A regular Art card can be found in 30% of packs and a foil-stamped Signature Art card can be found in 5% of packs.) In every pack you will find a combination of 1-5 cards of rarity Rare or higher and 3-6 Uncommon, 5-9 Common, and 0-1 Land cards
Also, some decks like the roll dice on demand aspect
I'd like to see it return on future cards, but the mechanics limitations really put Wizards in a tight space
The commander, Teval, the Balanced Scale, creates a loop of sacrificing and reanimating that feels inevitable in long games
This is also why Wrenn and Six fit naturally into strategies built around multiple planeswalker commanders, where protecting incremental advantage engines matters more than winning quickly
I also like this with Black tappers like Ghoulcaller Gisa since you can tap and give them undying right before they die to destruction removal like Murder and Wrath of God