QI used hBP04-037〈Ichijou Ririka〉's Arts "Oh? Wanna Fight?" to deal 50 special damage and 30 special damage to my opponent's center position hBP01-067〈Takanashi Kiara〉with hBP01-121〈Kotori〉attached.
In this case, how much damage will be dealt?

AEach instance of special damage will get -10 damage, so 40 damage and 20 damage will be dealt.

QIf hBP01-067〈Takanashi Kiara〉's Arts 'Majestic Phoenix' requires returning 6 holomem in your archive to deck but there are only 5, what happens?

ADeal 130 damage to the opponent's holomem, then return 5 cards to your deck and shuffle it.
Effects specified by abilities will be resolved as much as possible.