Q1: My security stack is empty. Can I use this card without paying any memory?
Yes. When your security stack is empty, this card’s memory cost is 0.
Qualialise Blast BT7-100 R When using this card from your hand, its memory cost is equal to the number of cards in your security stack. [Main] 1 of your opponent's Digimon gets -3000 DP for the turn. Then, 1 of your [Rasenmon] gains <Security Attack +1> for the turn. (This Digimon checks 1 additional security card.) --- [Security] Add this card to its owner's hand.
Qualialise Blast BT7-100 R When using this card from your hand, its memory cost is equal to the number of cards in your security stack. [Main] 1 of your opponent's Digimon gets -3000 DP for the turn. Then, 1 of your [Rasenmon] gains <Security Attack +1> for the turn. (This Digimon checks 1 additional security card.) --- [Security] Add this card to its owner's hand.
Qualialise Blast BT7-100 R When this card would be used from your hand, its memory cost is equal to the number of cards in your security stack. [Main] 1 of your opponent's Digimon gets -3000 DP for the turn. Then, 1 of your [Rasenmon] gains <Security A. +1> for the turn. ---
クオリアライズブラスト BT7-100 R 手札のこのカードを使用するときに支払うコストは自分のセキュリティ枚数と同じになる。 【メイン】このターンの間、相手のデジモン1体のDPを-3000する。その後、このターンの間、自分の「ラセンモン」1体は≪セキュリティアタック+1≫(このデジモンがチェックするセキュリティの枚数+1)を得る。 --- 【セキュリティ】このカードを手札に加える。