Slay the Spire Endless Mode Guide: How It Works
Endless Mode in Slay the Spire lets you continue playing after defeating Act 3. Instead of ending the run, the game sends you back to Act 1 with the same deck and relics. Each loop becomes harder because the game begins adding Blights, which are powerful negative effects that slowly make the run more difficult.
This mode is designed for players who want to push a run as far as possible. The challenge is surviving the growing difficulty while your deck continues to scale.
How To Unlock Endless Mode
Endless Mode is enabled through Custom Mode.
To unlock Custom Mode you must play the Daily Climb once. After that, Custom Mode becomes available in the main menu.
Once Custom Mode is unlocked, you can enable the Endless modifier before starting a run.
Steps to enable Endless Mode
Play the Daily Climb once to unlock Custom Mode
Open Custom Mode in the main menu
Select the Endless modifier
Start your run with your chosen character and settings
When Endless is active, beating Act 3 no longer ends the run.
How Endless Mode Works
In Endless Mode the run loops after the Act 3 boss.
Instead of the run ending, the game restarts at Act 1 while keeping your deck, relics, and upgrades. This means your build continues to grow stronger over time.
However the game also becomes more dangerous each loop.
The main difficulty increase comes from Blights, which are special relic like effects that make enemies stronger or weaken the player.
What Blights Do In Endless Mode
Blights are negative relics that appear during Endless runs.
After defeating Act 3 bosses you begin receiving Blights instead of normal boss relic rewards. These Blights add major drawbacks to your run.
Common Blight effects include
enemies having more health
enemies dealing increased damage
drawing fewer cards each turn
gaining random status cards during combat
Blights stack over time. The longer the run continues, the harder each act becomes.
Endless Mode Strategy Tips
Endless Mode rewards decks that scale extremely well.
Runs can last many acts, so builds that grow stronger over time tend to perform better than early burst damage decks.
Helpful strategies include
building strong scaling damage engines
maintaining consistent Block generation
avoiding unnecessary deck bloat
focusing on relic and card synergy
Infinite combos and high scaling decks tend to dominate Endless Mode because they can keep up with the increasing difficulty.
When Endless Mode Becomes Too Hard
Eventually the Blight effects become overwhelming.
Enemies gain massive health pools and deal much higher damage. Even powerful decks eventually struggle once enough Blights stack up.
At that point the challenge becomes seeing how far your run can go before the difficulty finally catches up.
Final Blurb
Endless Mode in Slay the Spire is designed for players who want to push a run beyond the normal ending. After defeating Act 3 the game loops back to Act 1 while keeping your deck and relics. The run continues to grow harder because Blights add powerful negative effects each cycle. Surviving Endless Mode is all about building scaling decks that can keep up with the increasing difficulty.
FAQ
How do you unlock Endless Mode in Slay the Spire
You must play the Daily Climb once to unlock Custom Mode, then enable the Endless modifier before starting a run.
What happens when you beat Act 3 in Endless Mode
The run restarts at Act 1 with your current deck and relics instead of ending.
What are Blights in Endless Mode
Blights are negative relic like effects that make enemies stronger or weaken the player as the run continues.
Can you play Endless Mode with the Heart ending
No. Endless Mode replaces the normal ending and cannot be combined with the Final Act.
