Once per turn, if a card(s) is added from the Main Deck to your opponent s hand (except during the Damage Step): You can Special Summon 1 Generaider monster from your Deck in Defense Position. If you Special Summon a Generaider monster(s) during your opponent s turn (except during the Damage Step): You can Special Summon as many Generaider Tokens (Fairy LIGHT Level 4 ATK 1500 DEF 1500) as possible in Attack Position, but destroy them during the End Phase (even if this card leaves the field). You can only use this effect of Generaider Boss Stage once per turn.