A deck (not an archetype) based off rock and metal bands. Deck will be Rock-Type.
Here's in interesting idea that I'm too unmotivated to use: A Column-focused archetype with it's key card being a Continuous Spell Card by the name of "The Choice of Steins; Gate". Each of the cards would have effect that vary depending on which column they are in (consider each column a "World Line", if you will).