“Players can earn unique rewards like the exclusive Midyear Victor’s Laurel Wreath hat, and earn double Alliance Points, PvP gear, and rare crafting items during the event. Loot and bonuses are available in all PvP modes: join hundreds of players in the massive campaigns of Cyrodiil, engage in close-quarters street fights in the Imperial City, and compete in the intense, 4v4v4 arena-style showdowns of the Battlegrounds in Morrowind.”
The event begins on July 20th and runs to the end of the month. To hop in, just pluck the free Midyear Mayhem ticket from the cash shop and hop to your alliance gate in Cyrodiil to get moving.
Don’t care about PvP? There’s a new bundle in the cash shop themed to go along too.
Source: Press release, official site