Tap & fortressMilestones every 25 levels
Enemy Evolution
Every boss awards War Marks. Spend them to mutate the invading army. Mutations make runs harder but permanently improve enemy and wave rewards. This path is optional and survives ascension.
Threat mutationsReward +0%
Ancient Ascension
Restart from wave 1 and convert your progress into Ancient Cores. Each core permanently grants +10% damage and +3% gold.
Reach wave 50 to ascend.
Wave 50: Ascension unlocked.
Wave 75: Elite enemies appear more often.
Wave 100: Endless difficulty begins scaling faster.
Long game: repeated ascensions, tower milestones, hero levels, best-wave pushing and achievements provide the extended progression loop.