Crowley describes them "In the backgound are the bloodless images of the saints, on whom this image travels, for their whole life has been absorbed into the Holy Grail"
From Duqette the blood of the saints in thelema refers to "the ecstatic dissolution of all we are into the universal godhead (symbolised as a great whore and the Holy Grail she embodies)"
Revelations 17
"3Then the angel carried me away in the Spirit into a desert. There I saw a woman sitting on a scarlet beast that was covered with blasphemous names and had seven heads and ten horns. 4The woman was dressed in purple and scarlet, and was glittering with gold, precious stones and pearls. She held a golden cup in her hand, filled with abominable things and the filth of her adulteries. 5This title was written on her forehead: MYSTERY BABYLON THE GREAT THE MOTHER OF PROSTITUTES AND OF THE ABOMINATIONS OF THE EARTH. 6I saw that the woman was drunk with the blood of the saints, the blood of those who bore testimony to Jesus."
I wish this was my soul card. Unfortunately I get Strength in the RWS, and Adjustment in the Thoth. I would much prefer RWS Balance and Thoth Lust!