Your opponent cannot target «Blue-Eyes White Dragon» in your Monster Zone with card effects. If this face-up card is sent from the Spell & Trap Zone to the GY: Destroy all monsters you control. You can only use the following effect of «True Light» once per turn. You can activate 1 of these effects;
• Special Summon 1 «Blue-Eyes White Dragon» from your hand or GY.
• Set 1 Spell/Trap directly from your Deck, that specifically lists «Blue-Eyes White Dragon» in its text, with a different name from the cards you control and in your GY.