You can certainly play Commanders with Polymorph/Scramble elements that aren't dedicated to the strategy, such as with Neera, Wild Mage or other similar 'hit a big thing' decks, but the power behind playing a dedicated, limited choice for what you intend to hit off of a flip can greatly boost a deck's capabilities, and win games out of nowhere
These cards can be valuable and hard to replace
If Oathsworn Knight can't attack for any reason (such as being tapped or having come under that player's control that turn), then it doesn't attack
Very popular as a map and in the series and movies
BORDERLESS SCENE C 0333 Abomination, Terrifying Titan BORDERLESS SCENE U 0334 Avengers Tower BORDERLESS SCENE U 0335 Spider-Man, To the Rescue BORDERLESS SCENE U 0336 Doctor Doom BORDERLESS SCENE M 0337 Cosmic Cube BORDERLESS SCENE M 0338 Thor, God of Thunder BORDERLESS SCENE M 0339 Mjlnir, Hammer of Thor BORDERLESS SCENE M 0340 Blazing Crescendo BORDERLESS SCENE C 0341 Avengers Assemble
However, the most obvious use case for One with the Kami is as part of a game-winning combo