The Lasso of Truth forces people to tell the truth. It was forged by Hephaestus from the Golden Girdle of Gaea that Antiope had once worn. It is able to restore people's lost memories get rid of illusions or cause illusions to those it holds and heal the holder's body cure insanity and protect people who are in close proximity to it from magical attacks. In the golden age version the lasso could also take on a rigid form and hold people aloft from a great distance away. During these eras, the lasso also forced those who were bound by it to act as the holder demanded. This trait also affected Wonder Woman. A non-combat application of the lasso is that it can be used to change Diana's clothes as long as those clothes are "in the right frequency" as the lasso. Although this was a plot device used more often in the golden and silver age in has been used on occasion in modern comics as for instance one time Diana transformed into a Miss America costume. The lasso is essentially indestructible, and can be offensively used in combat to incapacitate, and even attacking their souls.
Soon thereafter, the gods secreted themselves away for a conference. At this time, Darkseid attacked Olympus. The dark god ceased hostilities, though, as soon as he realized the place was deserted. When the gods returned, they had decided upon destroying Mount Olympus and undertaking a "cosmic migration" to the stars. Over Hermes' objections, they took several steps. First, the three elder brothers made a new pact to replace the original pact which divided Earth among them. Then, they combined the will of all the gods (minus Ares) and the strength of Amazon prayer, and used Diana's bracelets to amplify that power (the bracelets are all that remained of Zeus' Aegis; this Aegis was made from the hide of Amalthea, the goat which reared him. Thus, the old home was demolished and New Olympus was created. In order to properly establish this new home, it was necessary for the Gods to sequester themselves indefinitely.
In Wonder Woman Vol. 1 #204, Diana's powers and costume were returned to her and she is once again reinstated as Wonder Woman. I-Ching is killed by a crazy sniper in the same issue. Later, Diana meets her sister Nubia, who is Hippolyta's daughter fashioned out of dark clay (hence Nubia's dark complexion). Nubia claimed to be the "Wonder Woman of The Floating Island", and she challenges Diana to a duel which ends in a draw. Returning to her home, Nubia would have further adventures involving Diana.