Creation of Mankind
The Isu are responsible for the creation of the human race. They’ve created Homo sapiens, designing them in their own likeness and image, yet stripped of their sixth sense and other characteristics, to insure they remain an inferior species and a docile workforce.
They also created Homo neanderthalensis. Unlike Homo sapiens, those were made as a military or an expeditionary force.
Pieces of Eden
The Pieces of Eden are high tech ancient artifacts that vary in their shape, size and purpose. They are often known to exhibit miraculous abilities comparable to magic. However, they’re not magic, but scientific devices which is far beyond our technological advancement level. Some of them are used as weapons, such as The Swords of Eden, others have controlling abilities like The Apples of Eden, while The Shrouds of Eden posses the ability to heal and even raise from the dead.
It is also known that Pieces of Eden can be used in conjunction with other P.O.E such as The Staff of Eden with The Apple, or the Koh-i-Noor diamond which, according to Durga, an Isu member can connect multiple P.O.E. together, for a purpose yet unknown.
Some of P.O.E. do not have one purpose or effect, that even The Isu themselves discovered their new purposes by chance, such as The Apple, which was discovered to have the ability to create things based on the collective thoughts of a group of people enthralled by its beam.
Shay Cormac discovered a different type of Pieces of Eden in Lisbon which had the ability to control seismic activity.
Abstergo Industries, along with Clay Kaczmarek, thoroughly studied history through genetic memory experiments in the Animus and have discovered that most legends and myths told throughout history are actually truly, with the part that is related to magic being actually an effect of one or more of the Pieces of Eden.