Playing them through the kid brothers effects boosts your leaders Power until the end of the opponents turn
No maximum hand size on a 2 mana creature is pretty nice, and its not imposing enough to be something that your opponents instantly need to remove, which means that youll likely get some decent card draw out of it as well
Use your other characters and their beefy stats to challenge threats with all the support characters, leaving the Madrigals free to quest to their hearts' content
Admittedly, this can only happen when youre casting a Legendary creature, however, thats what most of the best spells are
Intrigued by what the results are
Since the rise of the Mycotyrant, gnomes have been extremely useful as explorers, surveyors, and scouts outside the safe confines of the Core