Tower of Trials Solution (Floor 31): 3X 1*Senior Dark Ninja

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No admission: 5-6 star units, air units

My Solution: 11X Wind Mage, 1X 3* Senior Skeleton Warrior  

Difficulty (possibility of this solution not working out): High, there is quite a bit of luck involved 

Logic: This is tough and the position of these units are key. The Skeleton Warrior has to be the last unit rushing out. The idea is that the Wind Mages will keep the Dark Ninjas at "arm's length" while the Senior Skeleton Warrior, perhaps the most adept DPS non-5-star or higher unit in the game, bursts them down before then have a chance to chip away at your platoon of Wind Mages. Should they eat enough of the Wind Mages, the rest will fall swiftly and so will your Skeleton Warrior (yes, he has to be, at least in our experience, 3rd transcend level) because Dark Ninjas are brutal. Additional note: 3X speed should be sufficient.

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