These are the Grimm that Nihil can summon and control. When he controls a Grimm, the orange markings take on a deep purple, while their red eyes become a brighter shade of purple.

Beowolves

Alpha Beowolves

Ursa Majors

Nevermores

Griffons

Deathstalkers

Serpents

Dragons

Manticores

Trolls

Gargoyles

Evolved Dragons

Nidhoggs

Balrogs(Instead of green fire, it is a ethereal purple)

Hydras

Minotaurs

King Taijitus

Baron Felfiends

Geists