Meliodas, the Sin of Wrath

{4}{u}: Choose new targets for target spell. Copy that spell. You may choose new targets for the copy.
{x}{b}: Meliodas, the Sin of Wrath gets +X/+X until the end of the turn.
As any Holy Knight knows, you don't enter a fight with the Dragon's Sin of Wrath and walk away unscathed.