That trade looks unfair on paper, but stopping a game-winning spell while giving up a small flyer is an easy choice
Culling the Weak Weve looked at a few cards that sacrifice creatures to generate mana, but Culling the Weak does it the best because it turns a creature of any size into 4 mana
However, since increasing deck size hampers your ability to actually find your key cards, it seems that it's only worth it for one-card combo kills and you should play lots of tutoring and filtering cards so you can find them faster
Finally, Ashling, Rekindled is a 1/3 that transforms into Ashling, Rimebound to generate more mana
Its the 30th Anniversary of Magic, there have been tons of new products released for players to enjoy, and Commander has seen more decks than players know what to do with
The ability for a creature to return itself from the graveyard to the battlefield is inherently quite powerful