Reign of Fire: Terror Hound

This is an interesting card. When it comes into play you can switch the ATK and health values of an ally in play this turn. If there is a [0/X] card in play, kiss it goodbye with Terror Hound. You could also use its ability to benefit you, considering if you have a protector with [1/6] that doesn't have any kind of summoning sickness. Depending on the build, this is a great common card to include.