Temporal Archmage's +1 ability is a stronger version of Timeless Voyager's +1, allowing you to scry two before drawing a card, filtering your deck in the process
The Monsters Nezahal, Primal Tide as "Lagiacrus, Lord of the Seas" Drakuseth, Maw of Flames as "Rathalos, King of the Skies" Ziatora, the Incinerator as "Fatalis, the Black Dragon" Vaevictis Asmadi, the Dire as "Nergigante, Herald of Destruction" Sarulf, Realm Eater as "Zinogre, Lord of Lightning" These are, fittingly, absolute monsters expensive, huge creatures that could play really well as Commanders
After that you have Elder Gargaroth which is also over $10, while theres a set of highly playable cards in the $5-$9 range including Retrofitter Foundry, Lightning Greaves, Panharmonicon, and Triplicate Titan
Ruric Thar, the Unbowed Ruric Thar, the Unbowed saw some play out of the sideboard while in Standard
With a Howling Mine effect in play (Dictate of Kruphix is preferred), every turn nets you one card or more and allows you to chain turns until you eventually win with an awakened Part the Waterveil land
An 8/8 for five colorless mana and three white, she has flying, vigilance, and gives both herself and other permanents you control indestructible