A recent leak from Zenless Zone Zero is revealing the lineup of powerful bosses players will be able to challenge in the "Deadly Assault" game mode during Version 1.6. The urban action RPG from HoYoverse features several different endgame game modes for players to test out their skills and teams, with a variety of challenges. The Shiyu Defense game mode offers a similar experience to Genshin Impact's "Spiral Abyss," while the various "Hollow Zero" game modes task players with navigating roguelike mazes with increasingly powerful enemies. Now, one of the game's hardest challenges is getting a new update.