Botan and the others embark upon a new mission in the snowy mountains of Russia. An unidentified creature labeled "Bigfoot" is attacking mountain climbers, and a Shard of Tesla could be responsible, so they contact a mountain guide who encountered it.
The invention that Tesla
wanted most to keep locked up.
الاختراع الذي أراد تيسلا 
.بقاؤه مقفلاً بشدة
Um die Erfindung, die Tesla
am meisten verstecken wollte.
Es el invento que Tesla
más quería mantener oculto.
La première découverte
que Tesla avait scellée…
यह अविष्कार जिसे टेस्ला सबसे
ज़्यादा बंद रखना चाहते थे।
A invenção que o Tesla mais quis esconder.