Cannot be Special Summoned except from the Graveyard, and only if it was sent there from the field. If this card is Special Summoned: Target 1 monster in your Graveyard; this card gains ATK equal to that monster's Level x 200.
Time Machine can revive this monster as soon as it is destroyed. This would allow him to return to the field with greater attack points using his effect.
Cannot Special Summon from Deck / Cannot Special Summon from hand
This card gains ATK
Can Felgrand be special summoned from the graveyard with Dragon rebirth after being destroyed from the field by a trap card such as Michizure. Cause i used dragon totem to normal summon it to the field and it was destroyed by Michizure by my opponent and i tried to special summon it from the graveyard with Dragon Rebirth and it wouldn't let me, and the card says it can be special summon from the grave if sent to the graveyard from the field.
If by saying "only need a vanguard" means you thought throwing this card into the graveyard then special summon it somehow, then it also wouldn't work as it cannot be special summoned except when it entered the graveyard while it was on the field.
Tribute first then enemy mirror walled and use rope of life to ressurect it, and boom increase atk by 800 and it effect