Elixir of Mighty Thoughts

Elixir of Mighty Thoughts increases your Intellect by 45 for 1 hour.

Source
This item is created with Alchemy (395).

Deadnettle
Deadnettle is a relatively common "extra" drop while performing a node gather.

Talandra's Rose
Talandra's Rose can be attained from either named nodes in Zul'Drak or from Frozen Herb nodes.