Being able to cast one spell and get another for free helps counteract a few of the problems with this deck, notably its somewhat lacking land base for such big spells, and the deal is made even sweeter with some of the enters-the-battlefield effects you could be unexpectedly triggering
Since the formats inception, the key question in Modern has always been, What are the linear decks of the day, and can the midrange decks properly sideboard for enough of the linears? Were talking about decks with names that cause many a Modern player to groan: Affinity Infect Twin Eggs Dredge Storm Burn Tron Lantern Arrayed against these unfair, one-sided boogeymen lie fair decks (all named after their color combinations) like Jund, Jeskai, Abzan, Grixis, and U/W Control
Reckoner Bankbuster You probably know Reckoner Bankbuster from its long, banworthy stint in Standard, though I encourage players to test it out in Commander too, especially in decks seeking more card advantage
If youre chasing Canada geese off your lawn, technically you could be briefly considered a drover, until they turn around and start chasing you instead
Like, for example, on Dont Blink