As a modern commander, its both payoff and enabler, which makes this one of the stronger land sacrifice engines since it nets you some card draw and an extra land drop
Double-faced cards were in the set from the beginning, as they're the most effective way of showing how heroes and villains have big story-related changes, and Sephiroth becoming the one-winged angel was necessary
This deck is built around cheap spells, cost reducers, spell payoffs, and enough dragons to make Dragonstorm feel like more than just a cute inclusion
Cards like Overlord of the MistmoorsOverlord of the Mistmoors, Phyrexian TriniformPhyrexian Triniform, and Triplicate TitanTriplicate Titan all create their own tokens in some way
The Ur-Dragon will also occasionally swoop down from the Command Zone and show you that it's actually quite ferocious on the battlefield, too