Sky Dragon + Rose Spectre of Dunn → B. Dragon Jungle King

Sky Dragon + Ghoul with an Appetite → Curse of Dragon

Sky Dragon + Electric Lizard → Twin-headed Thunder Dragon

Sky Dragon + Snakeyashi → B. Dragon Jungle King

Sky Dragon + The Thing That Hides in the Mud → Stone D.

Sky Dragon + Stone Ogre Grotto → Stone D.

Sky Dragon + Trent → B. Dragon Jungle King

Sky Dragon + Queen of Autumn Leaves → B. Dragon Jungle King

Sky Dragon + Dokurorider → Curse of Dragon

Thunder Dragon + Thunder Dragon → Twin-headed Thunder Dragon

Thunder Dragon + Stone D. → Twin-headed Thunder Dragon

Thunder Dragon + Kaiser Dragon → Twin-headed Thunder Dragon