Sun Dragon Shield (C)
2
You may only cast this card during an attack on your opponent's turn, if you do not have a monster in the center, and you have a 《Sun Dragon》 on your field. [Counter] Nullify the attack, put the top card of your deck into your gauge, and you gain 1 life. If you have two or more 《Sun Dragon》 on your field, this card cannot be nullified.