lot of mtg cards 25 Random Rare Foils/Mythics/Planeswalkers 1000 Magic The Gathering Cards

In a format dominated by fetch lands and tutors, its much harder to stop searching libraries than it is to stop drawing cards, and as such most people will seldom play around a resolved Archivist of Oghma

Note there are no restrictions here beyond that any counter counts from anyone's stuff, and then when it dies you can send them to a dork like your Commander or other stuff and then this is tucked

What happens if one of these cards leaves the battlefield

Since Livio only costs 2 mana to cast, and 2 additional mana per creature you exile with an aegis counter, you can easily start setting this up early in the game, as commander tax is unlikely to render this commander unplayable later on