mtg ravnica city of guilds card list MTG: Every Set, Ranked Ravnica: City of Guilds Booster

Cards from the Assassins Creed set benefit this commander immensely, but cards in the original Ixalan or The Lost Caverns of Ixalan also support this strategy, and you can find other good vehicles in sets like Kaladesh

Imperial Recruiter

This enchantment never goes away either, returning to your hand once the creature it is enchanting dies, allowing you to reenchant something new

Wizards of the Coast simplified their products to reduce confusion and combine the best features of Draft (playability) and Set (excitement) boosters into one

Of course, the only real way to deal with Progenitus is with a board wipe of some kind, but, even then, if it goes into the graveyard you just shuffle it back into your deck