NPC BARRIERhttps://irowiki.org/wiki/NPC_BARRIER

Barrier
Type	Active Skill
Levels	1
Duration	10 seconds
Target	Self

Reduces all damage dealt to the caster to 1. During this time, it cannot attack or move at all.

• If you forcibly teleports monster to another location on the map (Snatch skill), they can attack even if under the effect of Barrier.