If a player's deck is just not built around their commander, but everyone else is playing a deck that is highly dependent upon having their commander on the field, they'll be free to play Drannith whenever they like because they don't mind having their commander unavailable to them
Otherwise, put it into your hand. You can literally win games by just having them and Spore Frog out
Using this rule, its possible to understand and enjoy MTG after just a brief tutorial
It could be a decent 3-drop in an artifact pod deck like Iron Man, Titan of Innovation, or any deck that could sac and reanimate it for continuous value
This dynamic duo does just that, letting you win the game in whatever zany way you choose.
Being able to cheat out Sagas to the battlefield is also a great way to interact with the board there just isn't any other card in Magic right now that lets you do that