While 10 or more "X-Saber" monsters are in your field, GY, and/or banishment, "X-Saber" monsters you control gain ATK equal to their original DEF. You can only use each of the following effects of "Saber Combination" once per turn. If you Special Summon an "X-Saber" monster(s) from the Extra Deck (except during the Damage Step): You can Special Summon 1 "X-Saber" monster from your hand or Deck. When an opponent's monster declares an attack: You can Special Summon 1 "X-Saber" monster from your hand.