Undead Challenge 1
Deadly Impatience
"The walking dead aren't very fond of a living being among their kind. Fortunately for you, an army of shambling corpses is slow to both think and move."
Requirements: Undead as Base Faction, Reincarnation 2+, True Night upgrade purchased.
Note: Drow can be used but not required.
Challenge: Get 6 assistants via Undead Heritage.
Note: This takes 11 hours, 6 minutes, 40 seconds.
Effect: Undead Heritage works 5000% faster. (Effective 7.14x boost)
Upgrade: Works with Undead
Tip: Awarded if your playtime is at least 11h, 6m, 40s and you have True Night and the Undead Trade Treaty. You do not need to own the Heritage or have it unlocked
Note: No upgrades will reduce the time required.
Undead Challenge 2
Experienced Helpers
"The walking dead, pleased with your newfound strenghs, send you on a mission to reap as many souls as possible under the cover of the Night to bolster their forces."
Requirements: Undead as Base Faction, Reincarnation 8+, Undead Bloodline, Undead challenge 1 completed.
Note: Drow can be used but not required.
Challenge: Cast Night Time when you have over 100 assistants.
Effect: Assistant production is increased by 10%.
Upgrade: Works with Elf
Undead Challenge 3
Death Knights
"The walking dead are prepared for a zombie invasion.Their last task for you is to loot the local cemeteries for possible equipment."
Requirements: Undead as Base Faction, Reincarnation 18+, Undead Unique Building, Undead challenge 2 completed.
Note: Drow can NOT be used unless you can get Drow's Unique Building at R28+.
Challenge: Collect 100M (1E8) Faction coins
Effect: Increase your number of assistants by 10%.
Upgrade: Works with All
In-Game Challenge Final Reward
Midnight Time
Effect: Increase Night Time assistant bonus based on time spent offline this reincarnation.
Formula: 0.2 * (x / 60) ^ 0.7%, where x is your Time Spent Offline (This Reincarnation) stat in seconds.