If you pick up a couple of UR/UB duals and a World Map, you could use those to splash the powerful Shantotto, Tactician Magician, which plays incredibly well with those spells
Viridian Revel, Disciple of the Vault, Tarrian's Soulcleaver, Pain Distributor, and Sardian Avenger each work with treasures that opponent's use
However, if an effect instructs you to search your library for a card with a basic land type, you must search for a land that is a Plains, Island, Swamp, Mountain, or Forest, regardless of whether or not the land is basic
As mentioned, Codsworth is decently popular in Commander, and theyre not exactly the most common MTG card
Daretti, Rocketeer Engineer Goblin Up Your Graveyard While the Guidelight Voyagers are one of the best things about Aetherdrift, Daretti is the best, full stop
EDIT : A friend pointed out that a sorcery and instant with landfall does exist, so the RNN actually wasnt the first one to experiment with that