Many of them are from MTG's pre-Mending era in the story, but one of the most important characters is Urza
Vrondiss, Rage of Ancients serves as the engine of the deck, generating Dragon Spirit tokens whenever he or another creature you control is dealt damage
The only matchup I can think of where the benefits of shutting the opponents mana off potentially outweigh shutting off my creature lands is U/W/R Control, and even then this lets them use the Tear side of the Wear // Tear they usually bring in (assuming they are smart enough to fetch out their basics early on)
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