After first beating Malthael in Diablo 3: Reaper of Souls, I received 3 legendary drops.
While I'm fairly certain that the boots were a random drop, I don't think I could get as lucky to get Reaper's Wraps and Fear without there being a method to their drops.
Are all of these drops random? Do you always get the crafting material with the plan? I think that the Reapers items only drop upon killing Malthael, but I killed him again and I did not get any legendaries.
How can I get more of these legendary drops?