Being able to ramp when it attacks or enters the battlefield is a powerful effect, especially in formats with access to fetch lands
Chaos: Whenever you roll Chaos, put a divinity counter on Temple of Ascendance, then you gain X life, where X is the number of divinity counters on Temple of Ascendance
Also, Decks built mainly from the cards in this Booster are very powerful, making it easy to reach the Summit of the game for anyone!
Sleeved boosters will remain at 5 per customer
To deal with these, it's best to run a small suite of counterspells (if your colors support it) to stop these things from blowing up your board
Because I dont have a particular Doctor thats my favorite from the series, instead Ill rank them from my least to most favorite in terms of the gameplay each promises