Tsumuha-Kutsunagi the Lord of Swords — Ruling

Regola generale

Regarding the『You can Tribute Summon this card by Tributing 1 Normal Summoned/Set monster』text:
This is not treated as an effect.
When Tribute Summoning this card this way, you can also Tribute a Normal Summoned/Set monster that is currently in face-down Defense Position.
You can also Tribute Set this card in face-down Defense Position this way.
You can also Tribute Summon this card normally, by Tributing any two monsters, without using this method.

About this card's ① st effect:
This effect is a Trigger Effect, which must be activated in the Monster Zone.
This effect must be activated if the activation condition is met. (Activating it is not optional.)
It also activates during the Damage Step.
When this effect resolves, your opponent can apply『send any number of cards from their field to the Graveyard.』If they do so, and any cards are sent to the Graveyard as a result, you then apply『each player draws the same number of cards as were sent to the Graveyard by this effect.』Additionally, after resolving this effect,『during the End Phase of the turn this effect was activated, shuffle all cards into the Deck from the field, the Graveyards, and that are banished.』
This effect affects the cards your opponent chooses. (Your opponent can choose a card that is unaffected by monster effects, however, that card will then not be sent to the Graveyard.)
Your opponent chooses which of their monsters will be sent to the Graveyard. However, any monsters sent to the Graveyard will be sent to the Graveyard by you, not by your opponent.
Applying『shuffle all cards into the Deck from the field, the Graveyards, and that are banished』during the End Phase does not start a Chain.

About this card's ② nd effect:
This effect is a Trigger Effect, which must be activated in the Monster Zone.
This is a mandatory effect, which must be activated if the activation conditions are met.