Enter with a key and open your earned chests
Use a Dungeon Run Key to start a Dungeon, then clear chest-marked rooms and open your earned chests at checkpoints or later in the run. For Snow Reaper (War), gold chests are the reward to chase.
Find Dungeons and get a Dungeon Run Key
The older Update 20 layout placed Dungeons in the left-side menu next to Contracts. Look for that entry as your starting point when finding the mode. You need a Dungeon Run Key to enter, so check your supply before preparing an attempt.
The March 2025 key options included one daily-login key and a Gambler shop near Summon offering three keys for ten Sacred Treasure. Check the current login reward and Gambler inventory before planning around those older offers. Read the purchase offer shown in your game before spending Sacred Treasure.
Follow the Dungeon chest-room loop
- Use a Dungeon Run Key at the Dungeon entry to begin your attempt.
- Choose a route that matches your team's strength, using reachable chest rooms as your difficulty target. The branching maze contains combat rooms, shops, curses and treasure-chest rooms, so consider what your team can clear before pushing farther.
- Clear a chest-marked room to earn its chest. Reaching a room is only part of the goal; completing it is what earns the reward.
- Open earned chests at a checkpoint when the opportunity appears. This lets you claim the chests you have earned instead of leaving them unopened while you continue.
- Continue into deeper rooms while the route remains manageable. The documented maze reaches up to 20 depths, but make reliable chest clears your goal before aiming for maximum depth.
- Open any remaining earned chests later in the run before abandoning it. Early abandonment was reported to consume the key and forfeit unclaimed run rewards.
Chase Snow Reaper through gold chests
Snow Reaper (War) is the Dungeon-exclusive Secret associated with gold chests. It is the base form used to evolve Snow Reaper (Final). Clearing deeper rooms and opening the relevant chests gives you a chance at the unit, so completing a run should not be treated as a guaranteed Snow Reaper reward.
Snow Reaper's appeal is crowd control: she slows enemies in her range and freezes them as chill builds. That makes her a useful target if you want more time to damage enemies before they move past your team. Keep the chest grind manageable rather than building your farming plan around getting her immediately.
Keep Dungeon chests separate from portal drops
For the Dungeon reward loop, you clear chest-marked rooms and open the chests earned during that run. For Snow Reaper (War), the relevant target is a gold chest. Keep that goal in mind when choosing what to farm, because a portal drop belongs to a different reward route.
Watch the summer-event portal routes for Explosion Mage and Sky God if those are the units you want. Explosion Mage is reached through her portal, while Sky God is pursued through Sky Portals and his secret portal. Receiving a portal still leaves a portal run to complete, and beating Sky God offers a chance at the unit.Playing this video connects to YouTube.