When you join the event, you'll first get to pick from one of three possible themes, pulled from all those possibilities we listed above
It could also mean a new type of card or item that can be equipped to a character like Armor or a weapon
Additionally, due to it being a big part of this set, Colorless gets a section, as do MDFCs (Modal Double Face Cards)
Ignoble Hierarch takes it even further with exalted, improving every attack you take with a single creature
You can recover that life by attacking with Grislebrand since it has seven power and lifelink, making it an efficient way to keep your hand full
I, for one, want a Limited format that played like Return to Ravnica populating 3/3 Centaurs or 1/1 Birds for small advantages