If you can get more than current non-foil retail for your set foils from this list, you should move on from them soon
That kind of sequence can flip the board in a single turn
Just for the sake of being complete here, the Tropical Island card (also found in that video above) rounds out most top 10 lists but is not considered part of the Power 9
Add Ashnod's Altar for infinite mana Sword of the Meek + Thopter Foundry + Time Sieve = infinite turns provided you can make five thopters Mycosynth Lattice + Sydri, Galvanic Genius = 1: target land is sacrificed Sydri, Galvanic Genius + Voltaic Construct + Grim Monolith/Mana Vault/Gilded Lotus = infinite mana
Transforming Etali, Primal Conqueror is mostly a last resort though, because why would you not want to keep casting Etali, Primal Conqueror to play all of your opponents' decks
Noctis, Prince of Lucis is a Rare, Legendary Creature - Human Noble card from the Magic The Gathering set Universes Beyond - Final Fantasy (MTGSC-FIN-0401)