The Morloh

The Morloh is a fearsome creature who lived on Caraxon and battled on Skaro after the Daleks have blown up the planet in the black hole Of Tatarus. Eventually, he taunted John and Lucas after he managed to escape the great war and was hidden in the shadows. Upon the arrival of The Doctor and Simon, he has decided to fight back, having to try to kill The Doctor (despite him being in his post-regenerative state), he has failed and killed John (having to make the sacrifice) instead and attempted again but failed and instead fell into a trap.