mtg 2020 commander deck Magic: The Gathering Enhanced Evolution Ikoria | 100 Card Deck %20Build%20your%20dream%20super%20team%20of%20Heroes%20and%20Villains%2C%20then%20suit%20them%20up%20with%20iconic%20gear%20and%20unleash%20their%20earthshaking%20abilities WotC Unveils All Five Commander

While their proxy boosters are very novel (as far as I know they and PrintingProxies are the only ones that do this), I would say they are best known for their ability to print and ship out any large list of cards you want, on demand

If a tapped permanent you control has more than one of the subtypes listed in Edward's first ability, count it only once when determining how many Treasure tokens to create

Gush is one of those odd support cards like Frantic Search that is most abusive in specific combo decks but still has a sufficiently generally useful effect (drawing cards!) that you can play them most places

The cEDH approach uses Rograkh as an easily-accessible piece of sac fodder for partner Tevesh Szat, Doom of Fools or a ritual like Culling the Weak