I don't know if it's too likely, but why add more shrooms when you could maybe get the same effect eating the extant ones raw instead of in soup. The red one ( ) could cause you to move faster and see the landscape in psychedelic colours. The brown one ( ) could cause the Nether portal effect without having to be in a portal. At least one should also queue some Pink Floyd.
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We are The Borg. Lower your shields and surrender your ships. Your biological and technological distinctiveness will be added to our own. Your culture will adapt to service us. Resistance is futile.
Knowledge is power. Power corrupts. Study hard, be evil
I think a rainbowed-out version of the .png that controls grass and leaf color depending on temperature and humidity would be a good start. If you don't know what it is, look up biomes on the wiki.
Something like this:
Knowledge is power. Power corrupts. Study hard, be evil
How to not die in a cave