The Time Raft is an Enigma created by Ancient Gina that allowed for control of time. When Dreadwing gained control of it, he used it to brutally conquer all the dragons in Jade Realm. However, in his paranoia that someone might steal the device from him, he order the Time Raft to turn off without knowing how to reactivate it. He spent hundreds of years trying to turn it back on and tried to force Gina Diggers to reactivate for him, only for her to order it to self-destruct and threw Dreadwing into chronospace for eons.
It is later revealed that Ancient Gina created the Time Raft in order to put Dreadwing in the position where he could help her create the Infinity Engine.