Card Rulings:Tornado Bird

OCG Rulings

 * The effect of "Tornado Bird" is a Trigger Effect that activates whenever it is Flipped face-up. Including during the Damage Step.
 * The effect targets exactly 2 Spell/Trap Cards on any side(s) of the field.
 * If there is one or fewer Spell/Trap Cards on the field the effect will still activate and start a Chain. Since two cards cannot be targeted, "Tornado Bird" will resolve without effect.