While some of the rarer cards are more expensive to trade, trading can help you fill in the gap in your collection with lower rarity cards being free to exchange
This is a value engine that helps stabalize the board, close out the game with the pump, and dodges the formats best creature interaction in Fatal Push and Lightning Axe
Bonus: It doesn't hurt that when Prepared for the Worst isn't needed for it's explicit purpose, you can chuck it at an investigate or fight action
You can also use this to hit a player in Commander, considering that their creatures will be out of combat for a turn
You can also add an Elesh Norn, Mother of Machines effect, only slightly better
Somewhat astonishingly, the Egghead Arc is the 32nd story arc of the overall One Piece saga, which just goes to show what incredible longevity the narrative has