Old Mushrooms

Found these in an old box under my bed. Had the cap and one stem for about two years, and the big blue one for maybe 6 months or so. Edible?

 

Lol

 

mafckas look like a otzi necklace

 

Edible, probably yes, but potent, i doubt it. Even kept in good conditions, i have read that they lose like 25% potency each 6 months and that looks like a really low dose . . .

 

thank you!