mtg rainbow commander deck Universes Beyond: Doctor Who Legendary creature rainbow deck :

Maybe bouncing a FrogmiteFrogmite back and forth to make infinite tokens and sacrifice them all to win

Outside of saving your creatures from targeted removal or sweepers, Galadriels Dismissal is equally apt at stopping an opponent from making a ridiculous number of Inklings with a well-timed Inkshield as it is at saving the table from a Craterhoof Behemoth cast into a huge board

The Math: This is where the Epic and Iconic rarities changed the game

Sure, this is a lot less relevant but it also only costs one

Cheating equipment onto the battlefield is a little less common, and I'm not sure we've ever had a commander that can do both

Like all cards, Lessons are evaluated differently in casual and competitive settings, so the best Lessons depend on the format you're playing