Master of dragon

Maybe you are referring to Dragon Master Knight.

Card Number: UE02-EN001
Type: Dragon/Fusion/Effect (Black Luster Soldier + Blue Eyes Ultimate Dragon)
Level:12
Attribute:Light
ATK:5000 DEF:5000
Description: This card cannot be Special Summoned except by Fusion Summon. This card gains 500 ATK for each Dragon-type monster on your side of the field except this card.