Unfortunately, the combo requires you to be in a black and blue colour identity, limiting the decks it can be used in
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
Pest Infestation Blowing up a bunch of artifacts or enchantments while generating a nasty swarm of Pests makes Pest Infestation one of the best interactive token generators, especially since you dont need targets for it to work
This set has many iconic legendary creatures ideal for casual play and Commander, but some are stronger than others -- and the three Gandalfs are not all equal
If you have other creatures to sacrifice to Sephiroth, you can pump up Aerith into a very chunky lifelinker that your opponent doesn't want to kill