Trask (real name Kristopher Patrick Englund) was an individual who represented the Celestis' interests at an auction for the Relic in the East Indies ReVit Zone on Earth during the late 21st century. When he attended the auction he was dead, re-animated by the Celestis to attend the auction. When he saw the Doctor, Trask remembered the Doctor had killed him by drowning, though the Shift later admitted that it had altered Trask's memory to be more "dramatic."
Trask made a deal with Qixotl following the inconclusive end of the auction's proceedings to take the Relic back to Mictlan. (PROSE: Alien Bodies)