Holy Mightstone

Confirmed in gameFrom the beta client, and the game shows the same numbers. They can still change before release. Why Blizzard hides items

Common, Miscellaneous, Junk, item level 50, item 20620. All items

Changed from Classic: the tooltips differ on the highlighted lines.

Classic Era 1.15.9.69722

Holy Mightstone

Item level 50 · item 20620

Binds when picked up

Junk

Use: Shatters the Holy Mightstone, granting 300 Attack Power and increasing Holy damage from spells and effects by up to 400 when fighting undead. Lasts 10 min.

Forever beta 1.60.1.70338

Holy Mightstone

Item level 50 · item 20620

Binds when picked up

Junk

Use: Shatters the Holy Mightstone, increasing Attack Power by 300 against Undead and increasing Holy damage from spells and effects by up to 400 against Undead. Lasts 10 min.

HiddenDataminedConfirmed in game

Read from the game clients' item tables through wago.tools. Some Forever items are not in those tables: Blizzard's server sends them to the game the first time it meets one, and we read the ones our game has received from its cache. The Forever client's stat amounts, armor and weapon damage are computed from its item level budgets the way the game computes them. Names, icons and item data © Blizzard Entertainment.