The gnome has flash, so you can plop it down in response just as your foe cracks an Evolving Wilds (it triggers off Fetchlands too)
This doesnt seem very funny at first, but think of the possibilities
While Ill probably be playing Bennie in my Adeline, Resplendent Cathar deck, it feels like he will also be at home in multicolor decks helmed by commanders such as Rhys the Redeemed and Ghave, Guru of Spores to churn out consistent value every turn
Instead of getting flyers, you get 3/3s with trample, haste, and crucially melee
Therefore, I recommend that most Spellslinger decks contain some form of combo, even if its just a four-card combo with no tutors
I really love Dinosaur Egg in most creature decks, but its obviously even better here, providing a nice consolation prize with discover equal to its toughness, which should easily grow thanks to its initial zero power and evolve ability