For every 5 Willpower purchased within range, you deal +0.10% increased Overpower damage per stack.
Your Occult Skills deal 15%[x] increased damage while you have any Overpower.
The data for Empowered reflects Season 14, patch 3.1.3. Entries are updated after balance changes.
In the "Glyphs" section of the Diablo 4 database — everything there can be filtered, sorted and searched.
