Its a political/social version of Kaervek that costs a little less, for the most part
The latest approach introduced with Innistrad Remastered is Magics Headliner Program, and it brings some newish ideas to the most chase cards in a set
The best use for this in these archetypes is in the Smokestack iterations that lean on resource denial rather than life drain to close the game
The cost reduction applies only to generic mana in the total cost of Aura and Equipment spells you cast
Magic is a vast, wild, and fun place to play, and Im glad that Wizards is putting a rael effort toward making its notoriously difficult on-ramp a little easier to navigate
Even the primary commander from The Ruinous Powers, Abaddon the Despoiler, grants cards in your hand cascade if their mana cost is equal to or less than the amount of damage dealt to your opponents in a turn