most rare mtg cards Top 30 Expensive Most Valuable Rare Cards -

A deeper card pool leads to a larger diversity of strategies, so making sure that each individual deck changes over time is less important

Ragavan allows midrange decks to take an aggressive stance, which has been tough for a number of years

Casting Emrakul is exactly what you'll want to do since when you do, you get to gain control of an opponent's next turn, giving them an additional turn immediately afterward that they will control

Find the synergy with your commander and figure out what will and wont work

These can be true doublers like Doubling Season and Branching Evolution or pseudo-doublers like Hardened Scales and Pir, Imaginative Rascal that technically only add an additional counter, but are close enough since counters are often distributed one at a time

Sevinne, the Chronoclasm Sevinne, the Chronoclasm works well because there are so many synergies surrounding it, like Secrets of the Dead and Torrential Gearhulk