The most obvious is to mill your opponents deck from different angles with cards like Glimpse the Unthinkable, Kitsune's Technique, Umbris, Fear Manifest, Krang & Shredder, Tasha's Hideous Laughter or Space-Time Anomaly
It magnifies, massive, damage that can be split up, like Arc Lightning into dealing 9 damage, and it increases damage to foes and their things only, so Red mass burn damage like Pyroclasm will deal four to your foes, but only 2 to your stuff
The classics of the genre are Soul Warden and Souls Attendant, and weve seen some powerful retrains lately like Guide of Souls
Amazing Spider-Man creates an interesting Commander that cheats in other powerful creatures for cheap
Isochron Scepter had a good theoretical case, but has yet to build up a good enough resume
It's a bit overcosted, but we can protect a creature from removal, flip it up, and use Etrata's ability to flip up any cards we cloak off it