Go Onizuka's monsters have been destroyed one after another though Revolver's tactics. His indomitable will to fight pushes him back to his feet, and, in this desperate situation with no apparent means of escape, he summons his ace monster, Gouki the Giant Ogre!
...I can add a Level 4 or lower Dark Dragon 
from my graveyard to my hand and summon it.
darf ich ein Dark-Drachenmonster
eu posso acrescentar um dragão
das trevas de nível 4 ou menor