Face-down Defence Position refers to a monster card that is both:In Defense Position (the card is horizontal)and face-down (you can only see the card's back)
Torrential Tribute and Bottomless Trap Hole can only be used in response to a monster's summon. Attacking a monster does not summon it (note that if the monster is face down, this is a Flip and not a Flip Summon).
As per usual game rules, you can Tribute Set him into face-down defence position, or special summon him in face-up defence position if the special summoning effect allows it. You cannot tribute summon him into face-up defence position.
A face-down monster can only be Normal Summoned in face-up ATK position.
A Normal Summon is face-up attack mode, a regular Set is face-down defence mode. You cannot Normal Summon or Flip Summon into face-up defence position unless an effect like Light of Intervention lets/makes you. Unless specified though, a Special Summon can be face-up attack or face-up defence position. However you can't special summon face-down unless an effect lets/makes you.
Yes, the tributed monster does not have to be face-up at all, it can be tributed while face-down.
Yes. Face-down monsters can be tributed for tribute summons, card effects, etc.
Yes, monsters may be 'tribute set'.
You would tribute two of your monsters, then Set the Lv7 monster face-down in defence position.
No, a Tribute Summon follows the same position rules as a Normal Summon, so a monster you Tribute Summon is either face-up attack or Tribute Set into face-down defense.
You cannot tribute summon a monster in face up defense position. You can either tribute summon a monster in face down defense or face up attack position. If you want to summon in face up defense, you need to special summon.
Yes, you can. Unless the card lore specifically states "...tribute one face-up [monster name]..." you can automatically assume that you can tribute it face-down. However, you must reveal to your opponent that the face-down monster is in fact Levia-Dragon - Daedalus before tributing it.
Face-down Defence Position refers to a monster card that is both:In Defense Position (the card is horizontal)and face-down (you can only see the card's back)
Torrential Tribute and Bottomless Trap Hole can only be used in response to a monster's summon. Attacking a monster does not summon it (note that if the monster is face down, this is a Flip and not a Flip Summon).
As per usual game rules, you can Tribute Set him into face-down defence position, or special summon him in face-up defence position if the special summoning effect allows it. You cannot tribute summon him into face-up defence position.
Yes, face down cards on the field count.
The monster will be flipped face-up at the beginning of the Damage Step. If the attacking monster is destroyed or switched to defence position before this, the defending monster is not flipped, as there is no Damage Step.