This page covers Diablo 4 rumors and unconfirmed information about Diablo 4 pre-release. This information has come from the community or possibly testers in the Alpha. Remember, none of this page has been confirmed by Blizzard.
Druid Mechanic
From a tester under NDA, the Druid class mechanic is tied to "spirit animals".
The ability to unlock offerings to spirit animals comes after completing quests. Each animal offering can give a passive bonus with give or six to unlock for each animal.
Offerings are only lootable by the Druid class
A "link" between the Druid and the spirit is created but it's not clear what this does.
Spirits can be either offense or defense-oriented [1].
Crafting / Collecting
Plants and "stones" can be collected
Elixers can be crafted to create 30 minute buffs [2].