Chaos Orb destroys any cards that it touches when it lands, whereas Falling Star deals 3 damage to any creatures it touches when it lands (and also taps them) and has no effect on non-creature cards
Streets of New Capenna releases today, so Im excited to see what if anything changes in the Modern landscape
In Pauper, it's a key piece of the cycling storm deck, where it plays a critical role in looping creatures and keeping the engine going
Other spells that synergize with creatures entering the battlefield are also good choices: Warstorm Surge turns those fresh creatures into immediate damage, and Soul of the Harvest generates even more advantage after your creature hits the field
Well, theyre great too, but outside of Elf decks or decks that care about dorks or overrun based on total creatures, theyre largely interchangeable with (and sometimes much worse than) land ramp like Exploration, Three Visits or Cultivate
Although this battle has six defense, the huge army of Knights you will have created as you play it should have no trouble tearing it down