H6-4: Operation Cocytus-4

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Operation Cocytus-4
Episode 06
Previous H6-3
H6-4 map.png
The fully empowered FrostNova has returned to the battlefield. Use your tactical acumen to endure the blizzard!
<Originium Ice Crystal> Periodically releases a frigid wave that will inflict Cold to affected allied units.


Recommended level
Sanity Drill Plan EXP LMD
10 1 100 (120) 100 (120)
Unit Limit Initial DP Life Points Enemies
9 10 3 144
Static devices Originium Ice Crystal ×4
Two of the Originium Ice Crystals are spawned after FrostNova, "Winter's Scar" is revived.


First clear
3 Stars
Originite Prime
Plaque - Convergence.png


Normal Light-Armored Soldier Leader ×31, Mortar Gunner Leader ×6, Infused Glacial Originium Slug α ×11, Razorfrost ×33, Yeti Operative ×30, Yeti Sniper Leader ×10, Yeti Caster Leader ×8
Elite Oneiros ×6, Yeti Icecleaver Leader ×8
Boss FrostNova, "Winter's Scar"