Bellator

Bellator was a Time Lord.

At the Time Lord Academy, Kenossium was mentored by Bellator, whose lessons taught her how to survive "four-time campaigns and a Time War".

He went to a regeneration tower <-Name is probably incorrect-> to select his next incarnation's form, but it went wrong and he was killed, alongside six other Time Lords who had died in the same way that very day.

(COMIC: The Clockwise War)