If a face-up "Kashtira" Xyz Monster(s) you control is destroyed by battle or card effect: Banish 1 "Visas Starfrost" from your hand, your Deck, or your Monster Zone, and if you do, Special Summon 1 "Vicious Astraloud" from your Extra Deck, ignoring its Summoning conditions. If this card is banished: You can target 1 of your banished "Visas Starfrost"; add it to your hand. You can only use each effect of "Kashtira Akstra" once per turn.
