NEKKISTANI

Planet of Origin: Nekkistan

The Nekkistani is a slug-like species which developed and advanced imperial civilisation with spacefaring and timefaring abiliities. They are known to have had dealings with the Time Lords. 

Source: Doctor Who universe (BFA: The Apocalypse Element) (BFG: Square One) (BFA: Medicinal Purposes)(BFG: Imperiatrix)