Well, you could keep them in enchanted, floating cases protected by a dragon miles underground...but then again, that's a lot of walking, unless you install a magical, dragonfire-resistant elevator 
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Hahaha Yes. Pretty beautiful dark souls to add to my collection~ They shall all go on my shelf [insert evil laughter here]
Hmm ill have one dark soul ,a light soul and 3 green souls for invincibility, how much will that be?...Wait, you keep the souls on a shelf? But what if robbers come, or one of them rolls off the shelf?![]()