One of these people patronized the alchemist Geber and formed a court including the founders of the Mutazsili, Malikiyah, and Hanaiyah schools. Another, Al ar-Rida, was allegedly poisoned by his political rival. The last one 
One of these people patronized the alchemist Geber and formed a court including the founders of the Mutazsili, Malikiyah, and Hanaiyah schools. Another, Al ar-Rida, was allegedly poisoned by his political rival. The last one underwent the (*) "ghaybah," often translated as "occultation," and is considered "hidden" by the Twelvers. For 10 points— name these original leaders of Shia Islam.
One of these people patronized the alchemist Geber and formed a court including the founders of the Mutazsili, Malikiyah, and Hanaiyah schools.
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