Onime-no-Enishi wrote...
This is a semi-nomi effect:
This card can only be Special Summoned by removing from play 1 "Blue-Eyes White Dragon" from your Deck.
which means it CAN be special summoned by effects like monster reborn, a true nomi effect:
This card cannot be normal summoned or set. This card CANNOT be special summoned except by having exactly 3 DARK monsters in your GY.
^ the nomi example given above CANNOT be special summoned by any means other than its own effect.
just adding a bit, semi-nomi monsters can only be special summoned with other cards after they are properly summoned, if they were sent to the gy by the effect of a card before they are properly summoned then they can't be monster reborn'ed or something