Retribution is a buff related to the Paladin gameplay in Diablo IV. It is associated with the Juggernaut Oath, and grants a chance for Thorns to pulse around the player when when Blocking. This damage counts as a Juggernaut Skill.
Paladin Skills
Basic
Advance • Brandish • Clash • Holy Bolt
Core
Blessed Hammer• Blessed Shield • Divine Lance • Shield Bash • Zeal
Auras
Defiance Aura • Fanatism Aura • Holy Light Aura
Valor
Aegis • Falling Star • Rally • Shield Charge
Justice
Condemn • Consecration • Purify • Spear of the Heavens
Ultimate
Arbiter of Justice • Fortress • Heaven's Fury • Zenith
Oaths
Disciple • Judicator • Juggernaut • Zealot