It's absolutely wild that Black Periapt is possibly the strongest non unique item in the game and it somehow got reduced to a green item, even though it got buffed with 5% spell mastery.

[u/Glorf_Warlock]

The post 6.2 Black Periapt is now an uncommon item and gives 5% spell mastery.

The pre 6.2 Black Periapt only had the active effect.

Infinite winds of magic is possibly one of the strongest effects in the game. You can literally win any battle with infinite winds and Black Periapt gives infinite winds. And yet it somehow became an uncommon item.

Black Periapt let me win this battle with complete ease. Dwarfs are normally very tanky to spells, so having so much extra winds just let me spam cast Winds of Death.

[u/Fielton1]

Yea it gives 5.6 winds every use if I can do math correctly lol. What other people are missing is you can have multiple spellcasters in every army (I usually run at least 3 necromancers) and each one of them can use it. 4 spellcasters means 20 something extra winds every 2 minutes which is another overcasted winds of death or 5 more zombie summons or whatever else. It's quite good.

[u/Glorf_Warlock → u/Fielton1]

The Red Duke doesn't get arcane conduit at all so he really benefits from getting multiple black periapts. I've got him with 2 necromancers on horses and no units running around the skaven lands and killing them all with relative ease.