In previous AC games, this was an unlockable. But in nexus, you can create a wave of energy with any blade. To do this, press [Left arm weapon] then quickly press [Boost] as you slash with your blade.

After defeating Yggdrasil Labyrinth boss and watching the credits, the "New Game" button will have a star on it. If selected, you have the option to start a new game by carrying the previous Guild ...