Can anyone please tell me what the mysterious device (cube shaped object) is for?

[dearcandy]

I've picked up 6 of these now and wondering what they're for?
Should I be bringing them with me at all times *in case* I need them or can I leave them at home when I'm out exploring?
Please & thank you :)

[Siara Otakulos]

Unloking the 6th boss. So until you don't have all 5 leave them in the base.

[Danyel]

info online is still lacking sadly in this game

[Danyel]

What do you do once you have all 5?

[dearcandy]

Siara Otakulos lähetti viestin:

Unloking the 6th boss. So until you don't have all 5 leave them in the base.

Thank you! :)