a ritual involving the sacrifice of blood
yes
There is no sacrifice without the Temple.
No. The Craft does not require blood sacrifice of any kind.
Blood sacrifice.
Catch My Killer - 2013 Blood Sacrifice - 1.5 was released on: USA:17 March 2013
The blood he spilt on the cross is a symbol of His sacrifice. In the Old Testament the Jews would have the blood of an animal split to sacrfice for their sins. Today we have the blood of Jesus Christ that we can claim for the forgiveness of our sins. We no longer have to make a sacrifice. Jesus is our sacrifice every time we do something wrong and ask forgiveness. There more we do wrong the more it hurts Jesus.
The sun, moon, and earth needed human blood for sustenance
Clean up the blood and get on with their lives.
None, though in the wide sense of the question you sacrifice your own ego. Buddhism is not based on shedding blood.
The higher the rank of the people, the more blood they gave. :(
Well, blood sacrifice and a summoning is always helpful.