The Break of Day
From SmashWiki, the Super Smash Bros. wiki
The Break of Day is a single-player event match in Super Smash Bros. for Wii U. In it, the player controls Pit, and must defeat 3 Dark Pits using the Daybreak. Defeating the Dark Pits with the Daybreak removes them from the match while defeating them by any other means causes them to respawn.
This event in unlocked by clearing Aura Mastery. Completing the event unlocks the left path.
Clearing the event within 70 seconds awards an Item Shooter Sacred Treasures equipment.