Complex sentence: The assault is successful and the Boss kills Matt with a brick, but Maero is saved by Donnie, flees to the Ultor Stadium in a last-ditch attempt to ambush the Saints leader.
Split into simpler sentences: The assault is successful and the Boss kills Matt with a brick, but Maero is saved by Donnie. Maero flees to the Ultor Stadium in a last-ditch attempt to ambush the Saints leader.