Cog Wyvern

Cog Wyvern is EX monster for the Cogs and a weaker version of Cog Dragon. He has 2 HP and 4 ATK. If he destroys a monster in battle, you can send this monster to GY to summon a Cog Dragon from hand, deck or GY. While on the field or in the GY, this cards name becomes "Cog Dragon".