Baruch Spinoza’s Icosahedron

Origin
Baruch Spinoza was a Dutch philosopher whose views were discarded during his life. After his death however, people were drawn to his rational ideas and ‘clear philosophies’. His magnum opus, the posthumous Ethics, in which he opposed René Descartes' mind–body dualism, has earned him recognition as one of Western philosophy's most important thinkers. He developed highly controversial ideas regarding the authenticity of the Hebrew Bible, culminating in his cherem, or excommunication, from Jewish society and his placement on the Catholic Church’s Index of Forbidden Books.

Effects
The icosahedron (20 sided die) clears the mind and allows the user to think rationally, but makes other people think his or her views are radical and dangerous. Very handy artifact in decision-making, but others will fanatically oppose and reject the users’ ideas.