The Darkshadow family What exactly are they? How did they come to be?

Dmitri Darkshadow was once a kindred born - a man that grew within a matter of 2 hours time, he never had a childhood, for he was a man with all the knowledge of the world from his time of birth.  -  He was the son of Nykola and Samantha Niyati - but Nyko and Dmitri fought to the point where Dmitri could no longer stand to even share the same blood line.

Since Dmitri was a scientist , he walked the earth until he found a woman named Devany she was a Toreador pure blood - together they found Landen who was a mage - Dmitri took both creatures blood and mixed it until it became the perfect mixture of Toreador/Tremere blood - He then bit Landen and fed him the same blood - Followed by Devany - Together the 3 created the Darkshadows family. 

Landen when possessed by the fates who were the 3 fallen Gods who then took over his body corrupting his blood, tainting it with fates blood - an Incubi - and pure demon.

Even when Landen lost the fates, his blood taint remained the same -

All those from Dmitri's line are purely Tremere/Toreador hybrid vampires
All those from Landen's line are Tremere/Toreador hybrids - with Incubi/Succubus - pure form demon - as well as fates blood creatures. (They are more powerful then any other)
All those from Devany's line are Tremere/Toreador hybrids vampires

Who are the Shadow Triad exactly?
Dmitri grew bored and once again delved into his Science experiments, molding flesh and shadow to form an army of shadow warriors known as the Shadow Triad - Rio, and Victor are the only survivors at this point.

This is how the Darkshadows came to be.