Q: Most expensive in order
If enough -1/-1 counters are put on Hei Bai at the same time to make his toughness 0 or less, his last ability will see all of the +1/+1 counters he had when he left the battlefield as well as the -1/-1 counters he had, and an equal number of each of those types of counters (plus any other applicable counters) will be put onto the target creature
She also has decent stats, with 4 Strength, 7 Willpower and an excellent 3 Lore for Questing
.@LoganPaul wearing the most expensive @Pokemon card in the world right now at #WrestleMania
Many were mana generators and others are recursive ones, which interact with the mechanics quoted previously
Pros and Cons These are super doable challenges just for playing the game, because when I discovered this, I'd already gained enough life to complete the Claws of Bast challenge