First of the Dragons [LDK2-ENK41] Common Promo you cannot Special Summon

you cannot Special Summon

from your hand

Set: Legendary Collection Kaiba Card type: Fusion/Effect Monster Rarity: Ultra Rare Attack: 2900 Defense: 2500 Must be Special Summoned with "The Fang of Critias"

A Synchro Monster that used this card as a Synchro Material cannot be destroyed by card effects

or 1 other "Spellbook" card from your hand or face-up field

First of the Dragons [LDK2-ENK41] Common Promo you cannot Special SummonSet: Legendary Decks II Card type: Fusion Effect Monster Rarity: Common Attack: 2700 Defense: 2000 2 Normal Monsters Must be Fusion Summoned and cannot be Special Summoned by other ways. You can only control 1 "First of the Dragons". This card cannot be destroyed by battle, except by battle with a Normal Monster, and is unaffected by other monsters' effects.