Living End suspends its namesake sorcery for {2}{B}{B} to exile all creature cards from graveyards and put them onto the battlefield, but this can be stopped by graveyard hate like Bojuka Bog, which exiles their graveyard so Living End returns no creatures. An extra Kozilek's Return is a marginal but real answer to their smaller reanimated bodies like Shardless Agent, though it won't touch bigger threats like Waker of Waves or Curator of Mysteries. There isn't much else in the sideboard that interacts with their suspend-based combo plan, so this matchup is mostly won by racing with your own ramp into Emrakul or Ugin, Eye of the Storms. Play around Force of Negation and Subtlety when trying to resolve your key threats on your turn.