Mirror Watcher
Effect Monster
LIGHT Spellcaster
★3 ATK 1400 DEF 1000
When your opponent activates a monster effect (Quick Effect, from your hand): You can send this card from your hand to the GY; negate the activation, and if you do, both players draw 1 card.
If you control no face-up monsters (Quick Effect): You can Special Summon this card, but its ATK becomes 0.
You can only use each effect of this card once per turn.