Tell me, weary traveller: When I say the words "peasant railgun", what image is summoned to your mind. A high-tech rifle used to liberate the working class of a fantasy world? No. It's 2,280 hirelings standing in a line, using rules chicanery and a pretty solid misunderstanding of how TTRPGs work to argue that a sufficiently motivated workforce can fling a ladder at 1,188 miles per hour.
This whole idea is more of a fun thought exercise, rather than something that was available to players in 5th edition Dungeons & Dragons. While, yes, a line of 2,280 creatures could move an object that distance with their readied actions, it also relies on applying the rules for a falling object to something going, you know, sideways, with the proletariat fulfilling the role of gravity.
This is, to put it simply, nonsense—rules as written, the ladder would zip several thousand feet before being (best-case scenario) hucked as an improvised thrown weapon for a mighty 1d4 bludgeoning damage. Maybe 1d12 if the DM is happy to accept that a ladder is equivalent to a greatclub.
That "once per turn" bit is the crucial part. Because the new ruleset lets you auto-fail a check to be grappled if you'd like, you could, hypothetically, hire a coterie of peasants to—on each of their separate turns, which will reset the "once per turn" limit on the spell's damage—laboriously shuffle your aura back and forth into the creature's space as many times as, theoretically, you have peasants to flood the initiative order.
Now, granted, this strategy's got a couple of weaknesses. First off, you're banking on your 20+ peasants not unionising before you march them into battle, or dying at the hands of a fireball, or a stiff breeze. D&D [[link]] also isn't a videogame with hard code—at any time, the DM can stare at you, say "no, that's stupid" and scupper your entire plan.
It is, however, pleasingly in-tradition and—more importantly—more rules-legit than its predecessor. It also fills me with a sense of pride that this nonsense has been discovered in less than a week—two days, by my mark, given the was released on September 17, and the post was made September 19. D&D's R&D division moves faster than a ladder through the hands of 2,280 beleaguered farmers.