It's not easy with Commander's 100-card decks, but it's still possible, and there are quite a few Dimir cards that can get the job done
Consider the difference carefully when deciding how to display your cards
Its the same as if you had a two drop 3/2 flyer that could only be cast if you discarded a card
Whats cool about this, other than that, is that everyone other player can do the same, and for every other player that does it, you get to do it again
While the set is geared toward beginners, it has some seriously powerful (and expensive) reprints
Not only do you get absurd cost reductionespecially considering how big green creatures are these days (look at the 4-mana 6/5 with upside in Colossal Rattlewurm)but also a potent finisher effect with the attack trigger