mtg commander copy deck Magic: The Gathering - Masters - Commander none) open.class Copy Opponent Creatures Deck (Commander

Key cards that youd be looking at are the likes of Ethereal Armor, which gets insane with a lot of other auras, or Blazing Shoal which you can use to make a creature huge for not much mana

I think even a single target Replenish would put serious constraints on the format and the types of designs WotC could safely make

Oblivion Rings are risky removal spells as they can be removed, but enchantment removal is less common than other forms of interaction

Not too shabby, but that's a lot of breaks - it's legendary, needs to be attacking, but it will work on stuff like Syr Konrad and such

Consider your goal for your readings