Clarify !res description (8927)

"The elements" was also kind of vague, given that a "shield of
resistance" only gives rf+ rc+. (Would you expect "the elements"
to include electricity? I'm not sure.)

(cherry picked from commit 772441d1a3625aa4cd878da5676207ba7fe569ff)
Fix mushroom suicide (elliptic, |amethyst)

(cherry picked from commit cc2d8528ce8191a98db7c817ef468e630d62c80c)