Verified for patch 16.8.1

Deep Freeze

The first time you fall below 90%, 60%, 40%, and 20% health, gain a 20% max health shield for 4 seconds. When this happens, release a frost nova that stuns enemies within 2 hexes for 2 seconds and deals magic damage equal to 15% of their max Health.

The radius increases by 1 each nova.

Recommended Roles: Attack or Magic Tank

Source

Anima

Effects

Armor: 30
Health: 550
HealthThreshold1: 0.9
HealthThreshold2: 0.6
HealthThreshold3: 0.4
HealthThreshold4: 0.2
HexRange: 2
HexRangeIncreasePerProc: 1
MagicResist: 30
MaxHealthDamage: 0.15
ShieldDuration: 4
ShieldPercent: 0.2
StunDuration: 2

Deep Freeze enables

Shield On the Menu

Grants temporary HP that absorbs damage before the unit's real Health is touched.