Challenge Modes

Note
You cannot succeed rooms or monsters when playing challenge modes, however, the game will let you store monsters and rooms before the run.

Unlocking Challenge mode

 * Easy Difficulty: Beat 100 days on all Hard Difficulty
 * Normal Difficulty: Beat 100 days on Trial 1 and the easy mode of that challenge
 * Hard Difficulty: Beat 100 days on Trial 5 and the normal mode of that challenge

Basic Strategy
For all challenge modes EXCEPT static speed and level 1 dark lord HARD, the following strategy can be used:


 * Use Tania with her 4 mana skill
 * Build an Ice Pit at the entrance. Surround it by five battle rooms. Upgrade to Frost Storm when possible. The trap will hit ALL surrounding heroes whenever one enters the trap room. If you get unlucky on the components, try again.
 * Otherwise, fill your dungeon ENTIRELY with battle rooms as soon as possible, and fill those rooms with the best monsters you can. This should be done by no later than Floor 80. Use rooms that give buffs to monsters (rage, concentration) and battle rooms that debuff heroes (panic, sloth, etc.). Avoid most traps.
 * Try to build as many fusion monsters as you can.
 * Books: don't read ANY on easy. on medium and hard, read only the Basic stat books, Grudge and Revenge, Biochem 1 and 2, How to be rich 1 + 2,
 * Floor 120: this is the hardest part. Before starting this, move any monsters with Mystic One into the dark lord's room, except for level 1 dark lord where they should never reach the dark lord's room. Single giant rooms are great for this part because it reduces the likelihood of hitting your own monsters.

Rebecca can be used to complete all the challenges, the only requirements are that your Rebecca have to be at least level 12 and having fallen axe unlocked. Electric Armor is not necessary but it helps a lot if you are missing damage.
 * Use Rebecca with her 4 mana skill.
 * Equip Fallen Axe asap on your Rebecca and Guardians. (good skills to use are Overspeed, Mystic one, Earthquake, Sandstorm, Magic Barrier, Smoke Shell and Frosty Storm)
 * Try to build as many fusion monsters and good fusion rooms as you can.
 * Books: don't read ANY on easy. on medium and hard, read the Basic stat books, Immortality, Grudge and Revenge, Kings Fury, Biochem 1 +  2 and How to be rich 1 + 2