Thunder King Rai-Oh
① Neither player can add cards from their Deck to their hand except by drawing them.
② When your opponent would Special Summon a monster (Quick effect):
You can send this face-up card to the GY;
negate the Summon, and if you do, destroy it.
● The ② effect can only negate the Summon of a monster while there is no ongoing chain.
(It can negate a Synchro Summon, or the Special Summon of Cyber Dragon by its own procedure.
It cannot negate the Summon of a monster being Summoned by a card effect, such as by “Call of the Haunted”).
It cannot negate the Summon of a monster being Summoned by a lingering effect, like “Future Fusion”).