# Overpower fundamentally changed mechanics in the Lord of Hatred era - old guides describing a crit-like proc chance are describing a dead mechanic

Overpower used to function like a percent-chance hit-type similar to Critical Strike (with Life+Fortify-based scaling on the bonus hit); the Lord of Hatred expansion replaced this entirely with the current simplified stacking-buff model (guaranteed stacks from specific triggers, each an independent-duration Additive Damage bonus).

Diablo IV patch 3.2.1. Category: season15. Evidence: Confirmed.

## Detail
This matters for anyone cross-referencing older, pre-Lord-of-Hatred community material: any explanation of Overpower as a '~3% proc chance, Fortify-scaling hit type' describes the deprecated system, not the current one. The current model is unambiguously easier to build around (guaranteed stacks from named triggers) but changes which Aspects/uniques are worth chasing.

## Why it works
The stated design goal of the rework was making Overpower 'easier to maintain and enhance,' consistent with replacing a randomized proc with deterministic, trigger-based stack generation.

## How to use it
When researching Overpower-based builds, discard any source describing a percent-based proc chance for Overpower itself; verify the source post-dates the Lord of Hatred expansion.