Previews for Commander Legends: Battle for Baldur's Gate have begun, but physical versions of the first official spoiler card have been printed with a mistake
Emrakul, the Aeons Torn isn't easy to get into play through mana, but spells like Summoning Trap, Through the Breach, and Sneak Attack can and have been used to cheat Emrakul into play for far fewer mana
We buy almost everything from High-End rarities (Power Nine, Dual Lands) to massive collections with thousands of Commons/Uncommons (Bulk)
Some cards that I think could build out this shell: Ugin, Eye of the Storm Summon: Bahamut Solemn Simulacrum Adventurer's Inn The Irencrag Sire of Seven Deaths Mazemind Tome Fountainport Jill, Shiva's Dominant & Joshua, Phoenix's Dominant Jill and Joshua are two cards that feel powerful enough in Standard, that feel like they slot into a number of already existing archetypes
You can't really have a functioning EDH deck without lands