My sister started playing MtG

[Antarctic Termite]

Is this a good thing, or should I be worried?

[Gwazi Magnum]

Normally a good thing.

Unless if making friends with more geeks, spending hundreds of dollars on card board cards and exercising her mind to adapt and learn extremely complex and advanced tactics isn't things to be considered good.

[Seravee]

Why is that a bad thing? MtG is a lot of fun.