These were the most straightforward executions of four-color commanders
Courser of Kruphix is better than a lot of the cards on this list however it is not certain to be a 2 for 1 if you don't see a land before it dies
The Mono-Blue Instant spell is often played in MTG Commander decks like Lord of the Nazgul, Sauron, the Dark Lord, and Urza, Lord High Artificer
There were a couple other creatures that had a big impact on me, such as the Ents
MtG Official Website - Pioneer Pioneer is the newest format established in October 2019, where all standard sets from Return to Ravnica onwards are usable, and it is a format without rotation
While a sorcery-speed edict for both players doesn't seem that exciting, being able to Regrowth a permanent is super powerful, allowing us to get back copies of Skeletal Swarming that get countered or do strange value-y loops by sacrificing an Eyetwitch to tutor up a lesson and getting back another Eyetwitch to do it again the next turn