Bahalutiya, the Grand Radiance — Ruling

Effetto 0

This card can be Tribute Summoned by Tributing 1 Effect Monster, instead of 2 monsters. (If you do, you can also Tribute a face-down Defense Position monster.)

This effect is a Trigger Effect that can be activated in the hand. (It cannot be activated during the Damage Step.)

This effect is a Trigger Effect that can be activated on the field. (It can also be activated during the Damage Step.)
When resolving this effect, your opponent banishes cards from the top of their Deck face-down equal to the number of cards in their hand, then shuffles their hand into the Deck and adds the banished cards to their hand. (Banishing cards and shuffling the hand into the Deck do not happen simultaneously. Shuffling the hand into the Deck and adding the banished cards to the hand happen simultaneously.)