Verified for patch 16.8.1

Bloodthirster

Once per combat at 40% Health, gain a 25% max Health Shield that lasts up to 5 seconds.

Recipe

Effects

AD: 0.15
AP: 15
HealthThreshold: 40
LifeSteal: 20
MagicResist: 20
ShieldDuration: 5
ShieldHealthPercent: 25
StatOmnivamp: 0.2

Bloodthirster enables

Shield On the Menu

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