ToME: the Tales of Maj'Eyal

I got an escort quest as a paradox mage, and cast Cease to Exist on some monster. After I killed it and time rewound, there were two of the escortee. One of them got killed by a monster and the quest failed, leaving a stationary version of the escortee sitting there. When I tried to swap places with...

I got to the third level of the temporal rift, killed the dragon and picked up the gems he dropped, but I don't have a portal down to the next level. I'm a paradox mage but I didn't use any time-splitting powers on him. He did get hit by a meteor from the prodigy though, if that's relevant.