Notably, Triumph of the Hordes is an excellent Overrun effect with the added benefit of granting the infect keyword to creatures that don't have it
What matters is that you connected
At the beginning of your next upkeep, you may cast that card from exile without paying its mana cost.) Illustrated by Zoltan Boros & Gabor Szikszai Standard Not Legal Alchemy Not Legal Pioneer Not Legal Historic Not Legal Modern Legal Brawl Not Legal Legacy Legal Comp
One of the more popular decks seeded by Modern Horizons 3, this archetype opts to run out a ton of instants and sorceries, discounting them with Ruby Medallion or the MTG planeswalker Ral Leyline Prodigy and ultimately finishing the game with a Grapeshot
The other parts you need are simply a zero-cost sacrifice outlet and some effect that can place a +1/+1 counter on creatures as they enter the battlefield: Grumgully, Path of Discovery, Juniper Order Ranger, or Rhythm of the Wild for example