Counter IV is an active skill in AION Classic 5.0. The Revenant learns it from level 34. It recharges in 12 s.

Learned by

Class	Faction	Character level	Skill level
RevenantLearned automatically	Both factions	34–42	1–9
RevenantLearned automatically	Both factions	71–75	10–14

Taught by

Item	Skill level
Counter IVRevenant (Skill Book)
[Event] Counter IVRevenant (Skill Book)