mtg adventures in the forgotten realms most expensive cards Aetherdrift: MtG: 11 Most Expensive Adventures

Similarly, they might have to forgo countering anything so that they can play their creatures

Because the worst version of Magic is still better than most of the competition

This Kozilek also forgoes indestructible in favor of more control over the stack, and a 12/12 menace puts people down in two hits

Stun counters might be what you're looking for

There are some what if Dreamborn characters who are more powerful or who have gone down a different path presented than their original story

That's all laid out in CR 707.2 with some additional details in the sub-rules of that section if you want to see it for yourself