Tamiyo's Journal: great artifact, although too heavy for any format other than battlecruiser Standard
The fact that you dont need to tap the creature is excellent, and you can use this card to self-mill as well
The Premium Card Collection -6 assort Vol.1- will contain a card booklet as well as Parallel Art reprints of the six following cards: Yamato (Anime 25th Collection [EB-02] EB02-006) Leo (Royal Blood [OP-10] OP10-057) Monkey D
The card, The Pokmon Illustrator (better known as the Pikachu Illustrator), is one of the most valuable cards in the Pokemon Trading Card Game
In many ways, this can be applied to longer games of Commander: people will get bored, or make suboptimal plays to move things along, often unwillingly initiating their own demise
Overlord of the Balemurk is the clear standout, milling cards, recurring cards, and presenting a big threat later on