A spell card is a symbol of those who use it. (originally スペルカードはそれを使う者の象徴)

Her effect was nullified...? (originally その効力が消えて白紙化。。。？)

That means... (originally と、いうことはまさか。。。)

...that by actions of this kappa... (originally あの河童の行動で)

...something about this girl was changed! (originally 彼女にまつわる何かが変わった、ということか！)

It means, that if everything is to be left as is... (originally だってすれば、果たしてこのまま放置して良いことか)

...this may adversely affect Gensokyo. (originally この事が、幻想郷に悪影響を与えて可能性は)

Hmph

Surprised