Generally speaking, steaks such as this are minimally seasoned with just salt and pepper. You want the meat to shine through, especially when using high-quality beef. Having said that, if you feel like adding spices (such as garlic powder and smoked paprika), you could. Just keep in mind that they'll char in the hot cast iron skillet, so you'll likely end up with blackened steak. If you do add spices, you might want to sear the steak for just 1 minute per side and increase the time it spends in the oven.