[Reboot] Additional Defence Boost I is a level 1 passive skill in AION Classic 5.0. The Gladiator learns it at level 1.

Learned by

Class	Faction	Character level	Skill level
Gladiator	Both factions	1	1

Taught by

Item	Skill level
[Reboot] Additional Defence Boost I (Gladiator)Gladiator (Stigma)	1