A 6/6 trample vehicle with only crew 1 rumbles a bunch of times with ease, and if you have any kind of blink engine, itll deal massive damage on its own, or even win on the spot if its an infinite combo
Combined with Exploration or Fastbond, the Horn quickly becomes an engine from which you can draw three, four, five, or more cards a turn, at no cost
This means no matter who has the biggest creature at the table, it has the potential to eventually become yours
We can then also use Angel of Glorys Rise to its full potential alongside the readily blinkable Fiend Hunter
Sink into Stupor / Soporific Springs I haven't stopped raving about Sink into Stupor since Modern Horizons 3 released, and I likely wont until a trip to the Soporific Springs scrubs it from my mind
Back to Basics (Hoser) Perhaps the best non-basic land hoser in all of Magic , depending if you consider Wasteland a hoser or just a good land destruction effect