>>1897614True röd flugsvamp(Amanita muscaria) is somewhat edible and will make you high but it's possible to overdose. Toppisar(Psilocybe semilanceata) is a pretty common psylocybin mushrom that is much safer.
Easiest edibles to find in sweden is a shitload of edible mushroms and berries if you pick them before the Thai berry pickers. Easiest food the get in the wild is fish thou.