4c HollowOne is an aggressive graveyard-fueled deck stocked with Hollow One, Vengevine, and Blazing Rootwalla that discards its way to a fast clock, so Brotherhood's End is a great sweeper, dealing 3 damage to clear their small creatures like Blazing Rootwalla and Marauding Mako before they snowball. Force of Vigor is mostly a sideboard luxury here since they run few artifacts/enchantments, but it can still hit an occasional problem permanent; more importantly it's a free spell we can hold up. Endurance is exceptional in this mirror-of-graveyards matchup, blanking Vengevine recursion by resetting their graveyard. Trim slow top-end creatures for the sweeper since we need to survive their fast clock while our own Living End comes online.