Verified for patch 16.8.1

Mirrored Persona

Every 6 player combats gain a lesser copy of Mirrored Persona (?/6). 

Share 15% of the holder's bonus Attack Damage, Ability Power, Attack Speed, Armor, Magic Resist, and Health with other Mirrored Persona holders.

Can't be Reforged, Lesser copies do not produce copies.
Unique: one per champion

Source

  • Artifact

Effects

AD
0.1
AP
10
AS
10
Armor
10
Health
100
MagicResist
10
NumCombats
6
StatSharePercent
0.15

Mirrored Persona enables

  • Armor On the Menu

    The physical-defense stat that reduces incoming AD damage. Tank items, Bastion-style traits, and ability bodies that read "Gain X Armor" or "Your team gains X Armor" all land here, alongside the handful of cards that scale a bonus off the unit's Armor value.

  • Magic Resist On the Menu

    The magic-defense stat that reduces incoming AP damage. Many sustain items, Bastion-style frontline traits, and "Gain X Armor and Magic Resist" effects grant or scale off it; the inverse — Shred — reduces it.

Mirrored Persona scales with

  • Attack Speed On the Menu

    Scales with bonus Attack Speed; a payoff axis for AS-stacking carries.

  • Ability Power On the Menu

    Scales with Ability Power. Damage and effect magnitudes that read "(scales with AP)" target this mechanic.