I definitely wouldnt rule out seeing him as a fringe option in cEDH either, even though I think that his lack of a third color will hold him back significantly
Mega Evolution TCG Set Guide: Full English Card List, Products, Cut Cards, and More
When paired with cards like Shuko, Lightning Greaves, or Umbra Mantle, you can repeatedly trigger Nadu at no cost, which puts lands on the board to trigger token generators such as Scute Swarm or Springheart Nantuko - both of which practically reset Nadu's text that its ability triggers twice per turn
Or, leave a card you dont want on top for the next suggestion
No matter which cards players choose to play, they can select the version that best evokes their memories of the games
They offer powerful ways to set up future effects and create interesting board states