Jizz

Primarch Angron and partner.

ImaginaryLovers

Surprise for the Primarch by MIXSAN

Warhammer_Smut

Yvraine, High Priestess of Ynnead watches ASTONISHED at the jaw-droping spectacle of Ultramarines Chapter Primarch Roboute Guilliman taking out his ENORMOUS space marine superhuman SCHLONG

Grimdank

Rise Thirteenth Primarch by DialupHero

Warhammer_Smut

Upvote Vulcan, the most wholesome of His Primarchs, to show these naked people a better way.

worldpolitics

Primarch Breast Press

Rule34Granblue

Water Guild War Final 2: The Blue-Eyed Primarch

Rule34Granblue